This website uses cookies to ensure you get the best experience on our website. Learn more

Alien Life: Will We Know It When We See It?

  • Alien Life: Will We Know It When We See It?


    What are scientists looking for when searching for alien life? A lot, it turns out: the search for extraterrestrials requires the help from astronomers, planetary scientists, chemists, computer scientists, and geneticists, just to name a few. But are we barking up the wrong carbon-based tree? Could alien life develop in ways we haven't dreamed of here on Earth? Hear Paul Davies, Sara Seager, Jack Szostak, and other experts give updates on the search for life outside our planet in Alien Life: Will We Know It When We See It? part of the Big Ideas series at the 2014 World Science Festival.

    This program is part of the Big Ideas Series, made possible with support from the John Templeton Foundation.

    Subscribe to our YouTube Channel for all the latest from WSF.
    Visit our Website:
    Like us on Facebook:
    Follow us on twitter:

    Original Program Date: May 31, 2014
    Host: John Hockenberry
    Participants: Jack W. Szostak, Paul Davies, Sara Seager, Dimitar Sasselov

    Carl Sagan and the future of finding alien life. 00:00

    John Hockenberry's Introduction. 2:23

    Participant Introductions. 5:45

    How close are we to finding aliens? 6:48

    How can you detect exoplanets that far away? 10:03

    Kepler 186 system. 14:49

    What are the tools you use to find Exoplanets? 18:00

    Detecting beer drinkers at a football game. 24:18

    What are we looking for on the microbial level? 30:05

    What starts life on any planet? 36:04

    Who will we call when aliens land on earth? 41:28

    Processing in analog and digital with a two denominational cellular optometer. 49:30

    The awakening of extraterrestrial life from the Vatican. 54:00

    How we may have cheated to form life from other planets? 56:50

    If we look for life where water is located are we ignoring life everywhere else? 1:04:54

    Can you elaborate on the possibility life on ancient mars? 1:08:39

    What are the new tools coming online today? 1:11:20

    What is the direct imaging technique? 1:14:50

    Testing the pedals on a space telescope. 1:21:00

    The conditions on earth that we need for life elsewhere. 1:24:32

    Communication basics from extremophiles. 1:28:05

  • x
  • Is Alien ‘Life’ Weirder Than We Imagine: Who Is Out There?


    If we want to discover alien life out there in the universe, we first need to figure out where to look—and what we're even looking for. Will it be biological like us? Could it be artificial, or take some other form we haven't yet considered? And how do we find something so fundamentally different from ourselves? In this program, scientists devise plans for searching for beings beyond Earth while they grapple with the very definition of life.

    PARTICIPANTS: Lisa Kaltenegger, Caleb Scharf, Susan Schneider, Sara Walker

    MODERATOR: Nicole Stott


    This program is part of the BIG IDEAS SERIES, made possible with support from the JOHN TEMPLETON FOUNDATION.

    - SUBSCRIBE to our YouTube Channel and ring the bell for all the latest videos from WSF
    - VISIT our Website:
    - LIKE us on Facebook:
    - FOLLOW us on Twitter:

    - Film about the imaginative search for alien life 00:05
    - Introduction to the program by astronaut Nicole Stott 04:45
    - Introduction of participants 05:50
    - What is the definition of life? 07:09
    - How will we find signs of life elsewhere in the universe? 16:21
    - What are the parameters for looking for life on other planets? 19:36
    - What should the probes on Mars be looking for to find life? 24:58
    - The Fermi Paradox, where is everybody? 30:56
    - Have aliens avoided humans because we're too boring? 34:41
    - Can we use information theory to look for life in the universe? 39:13
    - Why is looking for alien life important to humankind? 44:13
    - Will life in the future be AI, should we be looking for other AI in space? 46:02
    - The Great Filter 48:52
    - Is artificial intelligence alive? 50:28
    - Is evolution the strongest force in the universe, how will it shape the future? 52:13
    - What lessons could humankind learn from the successes and failures of other alien species in the universe? 56:58
    - Why should we care about finding life elsewhere in the universe? 57:58


    - Produced by John Plummer
    - Associate Produced by Laura Dattaro
    - Opening film written / produced by John Plummer, animation by Derek Breur
    - Music provided by APM
    - Additional images and footage provided by: Getty Images, Shutterstock, Videoblocks

    This program was recorded live at the 2018 World Science Festival and has been edited and condensed for YouTube.

  • x
  • Why Cant We See Evidence of Alien Life?


    Stand by for an animated exploration of the famous Fermi Paradox. Given the vast number of planets in the universe, many much older than Earth, why haven't we yet seen obvious signs of alien life? The potential answers to this question are numerous and intriguing, alarming and hopeful.

  • LIFE BEYOND II: The Museum of Alien Life


    Soundtrack: Support me on Patreon:

    What if there was a museum that contained every type of life form in the universe? This experience takes you on a tour through the possible forms alien life might take, from the eerily familiar to the utterly exotic, ranging from the inside of the Earth to the most hostile corners of the universe.

    New research is upending our idea of life and where it could be hiding: not just on Earth-like planets, where beings could mimic what our planet has produced, but in far flung places like the hearts of dead stars and the rings of gas giant planets. Nowhere in the universe is off limits.

    Only when we know what else is out there will we truly know ourselves. This thought experiment will give us a glimpse into what could be out there, how we might find it, and just how far nature’s imagination might stretch.

    Big thanks to Protocol Labs for their continued support of this series:

    Concept, visuals, and score by melodysheep, aka John D. Boswell. Narrated by Will Crowley. Additional visuals by Lynn Huberty, Tim Stupak, NASA, and Evolve. Featuring soundbites from Nick Lane, Jonathan Losos, Caleb Scharf, Shawn Domagal-Goldman, Chris Crowe, Jack Cohen, and Jill Tarter.

    Featuring clips from Lynn Huberty’s amazing film “SHYAMA”:

    3D models by:
    Andrey Gritsuk ( Alex Albinyana, Alexander Tobler, Andrey Shinkov, Millionth Vector, Jazz-Cousins, Nick Govacko, DCA Tabletop, Dimitar Grozev, Maynardd, Bernhard van der Horst, Alexandr Ivlev, 3DRTcom, AssetKit, Tebogo, Igor Puškarić, The French Monkey

    Thanks especially to:
    Lynn Huberty
    Juan Benet
    Rowdy Jansen
    Eddy Adams:
    Kimi Ushida:
    Gregory Cohen:
    Eric Capuano:
    John Maier
    Ali Aljumayd:
    Caleb Levesque
    Eric Malette
    Brandon Sanders
    Tim Stupak

    And to all my supporters on Patreon: Ada Cerna, Adam Orand, Ajish Balakrishnan, Aksel Tjønn, Ali Akın Kurnaz, Andrew Edwards, Andrew Valenti, Antoine C, Antoni Simelio, Augustas Babelis, Bhisham Mahtani, Bradley Gallant, Brant Stokes, Daniel Saltzman, Caleb Levesque, Case K., Cheshire 2e du nom, Chinmay Kumar, Chris Wilken, Christian Oehne, Christina Winikoff, Christopher Heald, Chung Tran, Colin Glover, Corentin Kerisit, Cozza38, Crystal, Dan Alvesved, Danaos Christopoulos, Dave LeCompte, Davee Hallinan, David Lyneham, david p boswell, David Southpaw, denise frey, Derick Yan, Dexter, dixon1829, Don Loristo, Dylan Webb, Eico Neumann, Eyubed Balcha, Ezri Dax, Gaétan Marras, Gary Wei, geekiskhan, Genesplicer, Giulia C., Håkon A. Hjortland, Hans Husurianto, Henry R. Seymour, Heribert Breidsamer, ilkercan Kaya, Iota Katari, is8ac, Jackie Pham, James O'Connor, Jayson Hale, Jean Neyrial, Jessica Turner, Jimpy, JM_Borg, Jordan Swickard, Jose Contreras, Joshua Oram, JousterL, Julian Büttner, Julio Hernández Camero, kaynen brown, Kristin & Alan Cameron, Laine Boswell, Lars Støttrup Nielsen, Laura, Laura Liddington, Layne Burnett, LemonHead, Lennart Klootwijk, Leo Botinelly, Leonard van Vliet, lloll887, Manu Galán García, Maraiu, Marco Cardamone, Mark Christopher, Mark T., Markus Oinonen, Marlin Balzer, Martin Majernik, Matthew Jacoby, Matthew Ullrich, Maxime Marois, Mehdi Bennani, Michael Li, Michelle Wilcox, Mike Norkus, Mind Wave, Mitchel Humpherys, Mohammed Aldaabil, Nathan, Nicholas Martin, Nikita Temryazansky, Nina Atesh, Nina Barton, Ninel, Patrick Keim, Patrick Schouten, Peycho Ivanov, PonWer, Preston Maness, Radu Turcan, Ramsey Elbasheer, Randall Bollig, Raz, RedOptics, Reg Reyes, Richard Sundvall, Richard Williams, Rob Phillips, Robin Kuenkel, Runi Winther Johnsen, Samih Fadli, Sandra, Sandro Heinimann, Scarlet Fortuna, Silas Rech, SilverFolfy, Smoka_Lad, SpartanLegends, Stefan, SunaScorpion, SymeSynth, The Cleaner, The Fellowship of Doge, TheHumungus, Timothé Wegiersky, Timothy E Plum, Trevor Robertson, Verissimus, Vinh Vo, Virgile Coulot, Whitney Champion, William Ronholm, Wise Doane, Wolfgang Bernecker, Yannic, ZAB, Алексей Козловский

    Research Sources: See (bottom of page)

    Peace and love,


    twitter: @musicalscience
    instagram: @melodysheep_

    Help us caption & translate this video!

  • x
  • Are There Aliens on Venus? | Planet Explorers | BBC Earth


    Venus is hell – it’s a toxic, overheated, crushing hellscape where nothing can survive. Every rover ever sent has melted. But Dr Clara Sousa-Silva thinks she has found evidence of life up in the clouds. It’s a game-changer in the search for alien life.


    #PlanetExplorers #BBCEarth

    Watch more:
    Planet Earth
    Blue Planet
    Planet Earth II
    Planet Dinosaur

    #PlanetExplorers brings you epic stories of exploration and discovery around five bodies in our solar system, told by the scientists who love and study them.

    Welcome to BBC EARTH! The world is an amazing place full of stories, beauty and natural wonder. Here you'll find 50 years worth of entertaining and thought-provoking natural history content. Dramatic, rare, and exclusive, nature doesn't get more exciting than this.

    Want to share your views with the team? Join our BBC Studios Voice:

    This is a commercial page from BBC Studios. Service information and feedback:

  • When will Alien Life be Found on Exoplanets?


    How long will it be before we find alien life on exoplanets? Exoplanet astronomer Dr. Ryan MacDonald explains how biosignatures can be found in exoplanet atmospheres. He also reveals how the discovery of the first close-in planet around a white dwarf could dramatically accelerate the hunt for alien life beyond the solar system with the James Webb Space Telescope.

    ***** Chapters *****

    0:00 - Introduction
    1:15 - Worlds Beyond Earth
    2:26 - Early Exoplanet Discoveries
    4:10 - Transiting Exoplanets
    5:26 - Transmission Spectroscopy
    6:24 - Exoplanet Atmospheres
    9:15 - The James Webb Space Telescope
    10:33 - Signatures of Life on Earth
    14:57 - Exoplanet Biosignatures
    16:34 - The Small Star Opportunity
    17:52 - Case Study: TRAPPIST-1
    19:44 - When Stars Die
    20:51 - White Dwarfs
    22:27 - The Discovery of WD 1856b
    24:04 - Earth-like Planets Around White dwarfs
    25:10 - The White Dwarf Opportunity

    ***** Animations and media *****

    Most animations and graphics used here were produced by NASA, ESA, and ESO. Special thanks to Jack Madden for producing the renders of an Earth-like planet around a white dwarf.

    ***** Music *****

    All credit to Aakash Gandhi for creating the two inspirational tracks included in this video and for releasing them into the public domain.

    ----- Further information -----

    ● 'Revealing the Nature of Exoplanetary Atmospheres' (my PhD thesis):

    ● 'The Astrobiology Primer v2.0':

    ● 'How to Characterize Habitable Worlds and Signs of Life':

    (free open access):

    ● 'Exoplanet Biosignatures: A Review of Remotely Detectable Signs of Life':

    ● 'The White Dwarf Opportunity: Robust Detections of Molecules in Earth-like Exoplanet Atmospheres with the James Webb Space Telescope':

    (free open access):

    ● 'A giant planet candidate transiting a white dwarf':

    (free open access):

    ● 'Atmospheric Retrieval of Exoplanets' (Martian Colonist video):

    #Exoplanet #AlienLife #JWST

  • x
  • How Is NASA Contacting Aliens? | Alien Life Documentary | Spark


    Subscribe to Spark for more amazing science, tech and engineering videos -

    With technology advancing faster than ever, and more and more discoveries being made every day, is the day we contact extraterrestrial life almost here?

    Follow us on Facebook:

    Follow us on Instagram:

    Content licensed from Espresso to Little Dot Studios. Any queries, please contact us at:

    #Spark #aliens #alienlife #conspiracy #space #spacetravel #isanybodyouthere #nasa #spacex

  • Astrobiology and the Search for Extraterrestrial Life - with Ian Crawford


    What can modern results in astrobiology tell us about the prospects for finding intelligent life elsewhere in the Universe?
    Subscribe for regular science videos:

    The famous Drake equation, which provides a rough estimate of the number of civilisations in our galaxy, predicts that space should be teaming with aliens. So where are they and why have we not found them yet?

    Watch the Q&A here:

    Ian Andrew Crawford is professor of planetary science and astrobiology at Birkbeck, University of London. Crawford is a specialist in the science and exploration of the Moon and in the search for life in the Universe. Before switching his research interests to planetary science in 2003, Crawford had a 15-year career at University College London as an observational astronomer specialising in studies of the interstellar medium. He is the author of over 130 peer-reviewed research papers in the fields of astronomy, planetary science, astrobiology and space exploration. Crawford is a Fellow, and currently Vice President, of the Royal Astronomical Society, and a former member of the European Space Sciences Committee (ESSC) of the European Science Foundation. In 2014 he was appointed to the European Space Agency's Human Spaceflight and Exploration Science Advisory Committee (HESAC).

    This talk and Q&A were filmed at the Ri on 16 October 2017.

    The Ri is on Twitter:
    and Facebook:
    and Tumblr:
    Our editorial policy:
    Subscribe for the latest science videos:

  • Alien Contact: What Happens Next?


    Are we alone in this vast universe? Some think that’s highly unlikely. With new technologies joining the search, NASA estimates we’ll find definitive evidence of aliens within 20 to 30 years. Which raises the vital question: And then what? Will the news inspire jubilation, despair, or fear? Will aliens be seen as gods or interlopers? Evidence of alien life will provoke fundamental questions about our place in the universe–not just about who they are, but also who we are. Join astronomers, astrobiologists, anthropologists, philosophers, and linguists as we ponder these issues.

    PARTICIPANTS: Kathryn Denning, David Kipping, Karen Lewis, and Marcelo Magnasco

    MODERATOR: Wendy Zukerman


    This program is part of the BIG IDEAS SERIES, made possible with support from the JOHN TEMPLETON FOUNDATION.

    - SUBSCRIBE to our YouTube Channel and ring the bell for all the latest videos from WSF
    - VISIT our Website:
    - LIKE us on Facebook:
    - FOLLOW us on Twitter:


    00:00 - Participant intros
    1:50 - How are scientists searching for intelligent life?
    5:10 - Sending messages into space
    6:59 - What kind of alien signal are we likely to detect?
    9:00 - Would we be able to interpret an alien signal?
    13:44 - What is the closest that intelligent life could be to Earth?
    16:25 - How would we know if far away transmitting civilizations still exist?
    20:00 - How well can we communicate with dolphins?
    24:19 - Dolphin research film
    26:27 - Understanding dolphins vs. understanding aliens
    28:44 - What are the steps to understand an alien language?
    38:02 - What happens on earth after we contact alien life?
    44:40 - War of the Worlds broadcast controversy and damage
    46:40 - Will the discovery of aliens unite humanity?
    50:39 - What if we’re alone in the universe?
    53:10 - Could AI help us find aliens?
    54:20 - Using our children to bridge languages and species


    - Produced by John Plummer
    - Associate Produced by Laura Dattaro

    This program was recorded live 6/3/18 at the World Science Festival and has been edited and condensed for YouTube.

  • x
  • We Asked a NASA Scientist: Do Aliens Exist?


    Do aliens exist? Extraterrestrial life has never been discovered. However, that doesn’t mean it doesn’t exist. And at NASA, astrobiologists like Dr. Lindsay Hays are trying to answer one of the most profound questions ever: Is there life beyond Earth? Explore more:

    Producer: Scott Bednar
    Producer/Editor: Jessica Wilde

  • An Exoplanet Home to Metal Aliens? | NASAs Unexplained Files


    Experts investigate if a nearby exoplanet could be the home to an alien civilization of strange, metallic monsters after a new discovery confirms that life can thrive on such a world.

    Stream Full Episodes of NASA's Unexplained Files:

    Subscribe to Science Channel:

    Like us on Facebook:

    Follow us on Twitter:

    Follow us on Instagram:

  • The UnXplained: Aliens Plot Our Doomsday


    Scientists at Cornell University come across evidence of multiple advanced extraterrestrial civilizations after analyzing a map of the Milky Way, in this clip from Season 3, Apocalypse When?

    Watch all new episodes of The UnXplained, Fridays at 8/7c, and stay up to date on all of your favorite The HISTORY Channel shows at


    Subscribe for more from The UnXplained and other great The HISTORY Channel shows:

    Watch more The UnXplained on YouTube in this playlist:

    Find out more about the show and watch full episodes on our site:

    Check out exclusive HISTORY content:
    History Newsletter -
    Website -
    Facebook -
    Twitter -

    From the producers of Ancient Aliens and The Curse of Oak Island comes The UnXplained, a one-hour, non-fiction series that explores the world’s most fascinating, strange and inexplicable mysteries. Hosted and executive produced by Golden Globe and Emmy Award-winning actor William Shatner (Star Trek, Boston Legal) each episode will feature compelling contributions from scientists, historians, witnesses and experiencers—each seeking to shed light on how the seemingly impossible actually can happen.

    HISTORY® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming.

  • Stephen Hawkings Stark Warning for Humans to Leave Earth


    In one of his final on-camera appearances, iconic physicist Stephen Hawking issued a warning to humanity about the existential threats we face and how our survival depends on colonizing another planet.

    From the Series: Leaving Earth: Or How to Colonize a Planet

  • Imagine Alien Life | Known Universe


    What would aliens on other planets actually look like?
    ➡ Subscribe:

    About National Geographic:
    National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.

    Get More National Geographic:
    Official Site:

    Imagine Alien Life | Known Universe

    National Geographic

  • Brian Cox investigates a potential alien signal ???? ???? - BBC


    Subscribe and ???? to OFFICIAL BBC YouTube ????
    Stream original BBC programmes FIRST on BBC iPlayer ????

    Professor Brian Cox visits the people who run SETI - the Search for Extraterrestrial Intelligence - and investigates whether we once received a signal from another planet. This signal has never been seen again and is now infamously called the WOW signal.

    #BBC #BrianCoxsAdventures #BBCiPlayer

    Brian Cox's Adventures in Space and Time | Streaming Now | BBC iPlayer

    All our TV channels and S4C are available to watch live through BBC iPlayer, although some programmes may not be available to stream online due to rights. If you would like to read more on what types of programmes are available to watch live, check the 'Are all programmes that are broadcast available on BBC iPlayer?' FAQ ????

  • Alien life on Earth | Outsiders | VPRO Documentary


    Meet Anton (70), who is certain that we're regularly being visited by alien life. With presenter Tim they go searching for UFO's and aliens.

    When Anton was 23 years old, he saw some noiseless orbs skimming over him in the sky . Since then he has seen such apparitions more often and is convinced that there are aliens on Earth. He has even spoken to one - after all, many aliens have human forms. Anton is charting where and when the creatures appear on Earth.

    Part of a series called 'The Outsiders', about people who consciously choose to live off the beaten path. What do the stories of these and other outsiders say about the way most of us live?

    On VPRO broadcast you will find nonfiction videos with English subtitles, French subtitles and Spanish subtitles, such as documentaries, short interviews and documentary series.

    This channel offers some of the best travel series from the Dutch broadcaster VPRO. Our series explore cultures from all over the world. VPRO storytellers have lived abroad for years with an open mind and endless curiosity, allowing them to become one with their new country. Thanks to these qualities, they are the perfect guides to let you experience a place and culture through the eyes of a local. Uncovering the soul of a country, through an intrinsic and honest connection, is what VPRO and its presenters do best.

    So subscribe to our channel, and we will be delighted to share our adventures with you!
    more information at

    Visit additional youtube channels bij VPRO broadcast:
    VPRO Broadcast:
    VPRO Metropolis:
    VPRO Documentary:
    VPRO World Stories:
    VPRO Extra:
    VPRO VG (world music):
    VPRO 3voor12 (alternative music):
    VPRO 3voor12 extra (music stories):

  • Why Alien Life Would be our Doom - The Great Filter


    The first 688 people to use this link will get 20% off their annual membership:

    Thanks a lot to Brilliant for supporting this channel.

    Finding alien life on a distant planet would be amazing news - or would it? If we are not the only intelligent life in the universe, this probably means our days are numbered and doom is certain.

    German Channel:
    Spanish Channel:

    This is how we make our living and it would be a pleasure if you support us!

    Get Merch designed with ❤ from
    Join the Patreon Bird Army ????


    The Kurzgesagt voice is from
    Steve Taylor:

    OUR MUSIC ♬♪
    700+ minutes of Kurzgesagt Soundtracks by Epic Mountain:


    The Soundtrack of this video:

    ???????????? PATREON BIRD ARMY ????????????
    Many Thanks to our wonderful Patreons from who support us every month and made this video possible:

    Jacob Palmer, Hugh Lynch, Jonathan Fritz, Max Schäfer, Christopher Lam, Gabriel Ming, Shawn Walsh, Christopher Siefe, ronald biggs, Noah Kriwat, Matt Meier, Eugene Chiong, Victor L., Neo Kimoto, Paavan Vasudev, Barrett Jay, Jeremy Auvray, Billy Earley, BlackSlime, Brian Santero, Eden Issier, klio, Jackson McLaughlin, Max Schumacher, Poker Chen, Scott Fitzhugh, Daniel Lima, Joseph Morris, Ashley Wright, Magesh, Carcajou Carbonneau, TheRedSnail, Peter Lindeberg, Christian Jipa, Dennis Latyshev, Peter Uran, Brennen, Ian Kirk, Ivaylo, Marilyn Wright, Igor Pavlenko, Diana-Alina Olaru, Ismael, Kat Lynch, Paul Watson, Jude Rigatoni, Neal Strong, MrWilliamDeathEsq, Simon Sardeson-Coe, shinnosuke goto, Matthew Melillo, Eboni Lowe, Erik Heemskerk, Glenn Willen, Paul Wood, Evie Blackwell, Emily Dingwell, Gerrit, Peder Aaby, Chris Lyons, Mary Wright, Scott Rowland, Rasmus Larsson, Jesus Sanchez, Blake Buettner, McEckett, André Abdom, Assaf Horovitz, Andrei Bucur, Leon Taubitz, Inkwell, Robert Wahl, Hosu Lee, Nathan Casados, Logan Johnson, Novita Sari, Jérôme Armengol, Matthew, William Moffat, Carl Reeverts, David Woo, Thomas Bjerre, Hugues Boisvert, Shawn Walton, George Thaxton, Matthew Dyet, Simon Wöhrer, Andy Nguyen, Roberto Gudiño, James Forrester, Nate Borland, Stefan Gauntlett, Christopher Burke, Damian Wiercioch, David Newman, Yolan Chériaux, Eric Marandon, Jason Hammond, Stephanie, Basile Nkeng, David Voesten, Rodrigo Gomez, Jeffrey Barber, Hiram Rogers, Chip Leibovich, François Temporel, Felipe Medeiros, Roland Deml, Josef Roupec, Filip Procházka, James, Axel Labeau, Tanguy Roué, Alexandre Courtemanche, Boris Matešin, MightEMatt, Cody Towner, Stephen Fletcher, Cramus, Sebastian Holc, Jacob Parry, Miggs Perez, Kim Selig, David Adams, Joshua Hopkins-DeSantis, Ameen Aqeel, Lauren Weislak, Kurzgesagt fan, Samuel Martin, Marian Bielcik, blake novak, Alex Au, Michael Duffy, Bakor Al-Tayar, Mark Ritterhoff, Tommy Alsemgeest, Geoffrey Lehr, Matt Carrier, Jason Ross, Ahmad Game, Alan Bandurka, Kevin Cooper, Sinuce, Jack Wilson, Chris Roadfeldt, Tasia Pele, Jared Sirmans, Viktor Stanchev, Dimitry Ivanov, Tom Shoolbraid

    Help us caption & translate this video!

    Why Alien Life Would be our Doom - The Great Filter

  • Signs of Alien Life Found On Venus - IGN Now


    Scientists may have discovered possible signs of life on Venus but the data isn't conclusive enough to say for sure.


  • Extraterrestrials - Why Theyre Almost Certainly Out There... | Chris Crowe | TEDxJohnLyonSchool


    “Our galaxy is home to billions of habitable planets. Chris Crowe guides us through the heavens on a journey to explore how many Earth-like planets our Universe contains. By examining the latest exoplanet discoveries he conveys his confidence that they’re definitely out there somewhere…

    Chris Crowe is an astrophysicist, teacher,
    and public lecturer. A Fellow of the Royal
    Astronomical Society, he works as Head of
    Astronomy at Harrow School, teaching
    Astronomy, Physics, Engineering and
    Computer Science. Chris received Masters’
    degrees in both Theoretical Physics and
    Mathematics before completing a PhD in
    Astrophysics, affording him the opportunity
    to be part of a research team studying relic
    radiation from the big bang, and work in
    the same department as the late Professor
    Stephen Hawking. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at

  • The Universe: Alien Creatures from Another Planet Located | Full Episode | History


    Join us as we highlight the trends that have defined us from the 1920s to now in History by the Decade -

    They soar through the heavens, fly through the oceans and glide along land. But these are not creatures found on a wildlife safari. These are life forms from another planet. Find out more in Season 3, Episode 5, Alien Faces. #TheUniverse
    Subscribe for more from The Universe and other great HISTORY shows:

    Find out more about the series on our site:

    Check out exclusive HISTORY content:
    History Newsletter -
    Website -
    Facebook -
    Twitter -

    HISTORY® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network's all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming.

  • x
  • Ancient Aliens: Da Vincis Alien Encounter


    Could Leonardo da Vinci’s mysterious disappearance be evidence of an alien encounter? Uncover more in this clip from Season 4, The Da Vinci Conspiracy.

    Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite The HISTORY Channel shows at


    Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows:

    Find out more about the show and watch full episodes on our site:

    Check out exclusive HISTORY content:
    History Newsletter -
    Website -
    Facebook -
    Twitter -

    Ancient Aliens explores the controversial theory that extraterrestrials have visited Earth for millions of years.

    HISTORY® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming.

  • We Might All Have Alien DNA | The Space Show


    Panspermia is a theory that life can spread naturally between planets. Amir Siraj studies how life on Earth might have first arrived from another world. He is the youngest person included in this year's Forbes 30 Under 30 list of scientists, and is a student at Harvard University and the New England Conservatory of Music.

    Subscribe to VICE News here:

    Check out VICE News for more:

    Follow VICE News here:
    More videos from the VICE network:

  • 2020 Isaac Asimov Memorial Debate: Alien Life


    Neil deGrasse Tyson, Frederick P. Rose Director of the Hayden Planetarium, hosts and moderates a lively discussion about how life might have formed on Earth and explores what alien life might look like elsewhere in the universe. What criteria do we use to classify life as we know it? Should the criteria be revised as we look for life on other worlds?

    Watch all the past Asimov debates:

    For a full transcript of this debate, visit:

    2018 Isaac Asimov Memorial Debate: Artificial Intelligence

    2017 Isaac Asimov Memorial Debate: De-Extinction

    2016 Isaac Asimov Memorial Debate: Is the Universe a Simulation?

    2015 Isaac Asimov Memorial Debate: Water, Water

    2014 Isaac Asimov Memorial Debate: Selling Space

    2013 Isaac Asimov Memorial Debate: The Existence of Nothing

    2012 Isaac Asimov Memorial Debate: Faster Than the Speed of Light

    2011 Isaac Asimov Memorial Debate: The Theory of Everything

    In 2020, the Museum is celebrating the legacy of Charles Hayden, whose vision made the Hayden Planetarium possible and brought the universe to New York City.

    2020 Asimov Panelists:

    Nathalie A. Cabrol
    Director, Carl Sagan Center for Research, SETI Institute

    Vera Kolb
    Professor of Chemistry, University of Wisconsin-Parkside

    Seth Shostak
    Senior Astronomer & Institute Fellow, SETI Institute

    Carol Cleland
    Director of the Center for the Study of Origins and Professor of Philosophy, University of Colorado

    Max Tegmark
    Director of the Foundational Questions Institute and Professor of Physics, MIT

    The late Dr. Isaac Asimov, one of the most prolific and influential authors of our time, was a dear friend and supporter of the American Museum of Natural History. In his memory, the Hayden Planetarium is honored to host the annual Isaac Asimov Memorial Debate—generously endowed by relatives, friends, and admirers of Isaac Asimov and his work—bringing the finest minds in the world to the Museum each year to debate pressing questions on the frontier of scientific discovery. Proceeds from ticket sales of the Isaac Asimov Memorial Debates benefit the scientific and educational programs of the Hayden Planetarium.

    #AlienLife #NeildeGrasseTyson #AsimovDebate #ExtraterrestrialLife #Intelligence #AMNH #ScienceDebate #ScienceLecture #AmericanMuseumofNaturalHistory #Aliens #Astrophysics #Philosopy

    Subscribe to our channel:

    Check out our full video catalog:

    This video and all media incorporated herein (including text, images, and audio) are the property of the American Museum of Natural History or its licensors, all rights reserved. The Museum has made this video available for your personal, educational use. You may not use this video, or any part of it, for commercial purposes, nor may you reproduce, distribute, publish, prepare derivative works from, or publically display it without the prior written consent of the Museum.

    © American Museum of Natural History, New York, NY

  • Calculating The Odds of Intelligent Alien Life - Jill Tarter


    View full lesson:

    Could there be intelligent life on other planets? This question has piqued imagination and curiosity for decades. Explore the answer with the Drake Equation -- a mathematical formula that calculates the possibility of undiscovered life.

    Lesson by Jill Tarter; Animation by TED-Ed

  • Is There Intelligent Life On Other Planets?


    PBS Member Stations rely on viewers like you. To support your local station, go to:
    ↓ More info and sources below ↓

    How are we looking and listening for intelligent life?

    Don’t miss our next video! SUBSCRIBE! ►►

    Now that we know planets are common in our galaxy, how would we tell if one holds life? Sure, it will take incredibly powerful telescopes and ambitious new space missions, but what are we looking for? What are we listening for? How do we help other worlds know that we are here?

    Here's the thing: Life on Earth has an expiration date. No matter what humans do, our aging sun will eventually be so hot that we can't survive. If we want to live on, it will have to be beyond Earth. The only question is, will it be US who live on, or just our radio broadcasts and dead satellites?

    If you missed Part 1 last week:

    Check out Five Billion Years of Solitude by Lee Billings:

    My Sagan + Valentine's Day episode:

    Ray Bradbury reading If Only We Had Taller Been courtesy of NASA/JPL

    More reading:

    The 7 hurdles for a planet to develop intelligent life:

    Sagan's rules for life:

    Earth is gradually getting more radio quiet:

    Searching for the archaeological ruins of extraterrestrial civilzations:

    How long will life survive on Earth?

    Joe Hanson - Host and writer
    Joe Nicolosi - Director
    Amanda Fox - Producer
    Katie Graham - Director of Photography
    Andrew Matthews - Editor and Motion Graphics
    Kate Eads - Production Manager

    Filmed at Onion Creek Productions in Austin, TX

    Produced for PBS Digital Studios

    Join us on Patreon!





  • If alien life exists on exoplanets, how would we know? BBC News


    Astrophysicist Sara Seager believes she has a way to reveal the biological secrets of a ‘second Earth’ – watch the video above to see how.

    Subscribe to BBC News HERE
    Check out our website:

  • The search for alien life: how do we know where to look?


    In searching for extraterrestrial life, scientists often start off by looking down at our own planet, Earth. But that might not be the right approach. Watch this video to find out the latest challenges in the hunt for aliens.

  • NASA: We could find alien life in 20 years


    NASA expects to find life in space in the next 20 years, says NASA administrator and former Astronaut Charles Bolden.

  • Will We Ever Find Alien Life?


    Viewers like you help make PBS (Thank you ????) . Support your local PBS Member Station here:

    You can learn more about CuriosityStream at

    The silence of the galaxy and the resulting Fermi Paradox has perplexed us for nearly 50 years. But our most recent surveys of the Milky Way finally allow us to draw scientific conclusions about the depressingly persistent absence of aliens.

    You can further support us on Patreon at

    Get your own Space Time t­-shirt at

    Tweet at us! @pbsspacetime
    Email us! pbsspacetime [at] gmail [dot] com
    Comment on Reddit:

    Help translate our videos!

    Previous Episode:
    What are the Strings in String Theory?

    Hosted by Matt O'Dowd
    Written by Matt O'Dowd
    Graphics by Luke Maroldi
    Assistant Editing and Sound Design by Mike Petrow
    Made by Kornhaber Brown (

    When Enrico Fermi uttered the words, “Where is everybody?” he was succinctly summarizing what has become known as the Fermi paradox. In short: in a galaxy of hundreds of billions of stars, each of which having billions of years to spawn life and civilization, isn’t it odd that none have made themselves apparent to us. Enrico Fermi was, supposedly, using this as an argument against the plausibility of interstellar travel. If aliens can travel between the stars, why haven’t they visited? But the paradox is much broader than this. There are several ways that an advanced civilization could give away their presence. Radio transmissions, robotic probes, or star-blotting solar arrays. A series of very recent surveys of our galaxy reveal none of the above, while at the same time proving the abundance of potentially habitable worlds. The Fermi paradox has become only more paradoxical, and these surveys are finally powerful enough to draw some serious conclusions about the rarity of advanced civilizations AND about the chance of us ever becoming one.

    Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters:

    Big Bang

    Justin Lloyd
    Anton Lifshits
    David Nicklas
    Fabrice Eap
    Juan Benet


    Dean Fuqua
    James Flowers
    Mark Rosenthal
    Roman Pinchuk
    Tambe Barsbay
    Vinnie Falco


    Chuck Zegar
    Dan Harris
    Donal Botkin
    Edmund Fokschaner
    John Hofmann
    Jordan Young
    Joseph Salomone
    Martha Hunt
    Matthew O’Connor

    Thanks to our Patreon Gamma Ray Burst Supporters:

    Alexander Rodriguez
    Alexey Eromenko
    Brandon Cook
    Brandon Labonte
    Daniel Lyons
    David Crane
    Fabian Olesen
    Fauzan Ardhana
    Greg Allen
    Greg Weiss
    Jack Frosch
    James Hughes
    JJ Bagnell
    Jon Folks
    Joseph Emison
    Josh Thomas
    Kevin Warne
    Malte Ubl
    Mark Vasile
    Nathan Leniz
    Nicholas Rose
    Nick Virtue
    Scott Gossett
    Shannan Catalano
    Shawn Azman
    Tommy Mogensen
    سلطان الخليفي

  • Why Extraterrestrial Life Might Not Be So Alien


    On the website for the department of zoology of the University of Cambridge, the page for Arik Kershenbaum lists his three main areas of research, one of which stands out from the others. Kershenbaum studies “Wolves and other canids,” “Dolphins and cetaceans” — and “Aliens.” Granted, science hasn’t yet found any aliens to study, but Kershenbaum says that there are certain things we can still say about them with reasonable certainty. Topping the list: They evolved. Read the full article at Quanta Magazine:

  • How Do We See Alien Worlds?


    Scientists think that prime real estate for extraterrestrial life lies in the habitable zones of solar systems—regions where conditions are just right for liquid water to exist. But how do you see a planet outside of our solar system in the first place? Astronomer Dimitar Sasselov explains how researchers use the Kepler space telescope to spot planets circling distant stars in this clip from Alien Life: Will We Know It When We See I?, part of the Big Ideas series at the 2014 World Science Festival.

    Watch the Full Program Here:
    Original Program Date: May 31, 2014

    Subscribe to our YouTube Channel for all the latest from WSF.
    Visit our Website:
    Like us on Facebook:
    Follow us on twitter:

  • How Long Until We Find Alien Life?


    In this clip from the 2014 World Science Festival program Alien Life: Will We Know It When We See It? biochemist and geneticist Jack Szostak, physicist/cosmologist/astrobiologist Paul Davies, planetary scientist and physicist Sara Seager and astronomer Dimitar Sasselov give their informed guesses on just how long it will be before we find evidence of extraterrestrials. Also, Szostak talks about verifying life in the lab, and Davies explains how we'll distinguish truly alien life from more familiar organisms that might have hitched a ride somewhere on a space rock.

    Watch the Full Program Here:
    Original Program Date: May 31, 2014

    Subscribe to our YouTube Channel for all the latest from WSF.
    Visit our Website:
    Like us on Facebook:
    Follow us on twitter:

  • Why Havent We Found Alien Life?


    Seems like Aliens SHOULD Be Out There!

    Sign Up on Patreon to get access to the Space Time Discord!

    Sign up for the mailing list to get episode notifications and hear special announcements!

    Check out the Space Time Merch Store

    Help translate our videos!

    With millions of Earth like planets around sun like stars in our galaxy alone, why don't we see intelligent alien life? Or any other life for that matter? It gets especially weird when you factor in new scientific revelations that life on Earth occurred crazy fast! So if you want to help us theorize on the real reasons we haven't found alien life, you should watch today's episode of Space Time!

    Is It Irrational to Believe in Aliens

    5 Real Possibilities for Interstellar Travel

    Ray Vertti

    Eric Vilas

    solution 99x


    On The History and Future of Cosmic Planet Formation
    Behroozi & Peeples 2015,

    Potentially biogenic carbon preserved in a 4.1 billion-year-old zircon
    Bell et al. 2015

  • Will We Ever Find Intelligent Alien Life?


    What can an equation tell us about whether or not we're alone in the universe?

    Host: Reid Reimers

    Support SciShow by becoming a patron on Patreon:
    Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out to Kevin Bealer, Justin Lentz, Mark Terrio-Cameron, Patrick Merrithew, Accalia Elementia, Fatima Iqbal, Benny, Kyle Anderson, Mike Frayn, Tim Curwick, Will and Sonja Marple, Philippe von Bergen, Chris Peters, Kathy Philip, Patrick D. Ashmore, Thomas J., charles george, and Bader AlGhamdi.
    Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records:
    Looking for SciShow elsewhere on the internet?

    Image Sources:

  • What would alien life actually look like? | BBC Ideas


    Spock? Predator? The classic humanoid body shape with big eyes? We don't think so. Biologist Adam Hart and illustrator Memo Kosemen combine their skills to predict how natural selection could see alien life evolve on a variety of alien worlds.

    Made by ClearStory.

    If you enjoyed this video, you might also be interested in MIT quantum astrochemist Clara Sousa-Silva wondering if aliens are already watching us ????

    Subscribe to BBC Ideas ????


    Do you have a curious mind? You’re in the right place.

    Our aim on BBC Ideas is to feed your curiosity, to open your mind to new perspectives, and to leave you that little bit smarter.

    So dive in. Let us know what you think. And make sure to subscribe! ????

    Visit our website to see all of our videos:
    And follow BBC Ideas on Twitter:

    #bbcideas #science #space

  • Finding aliens: Is there a ‘theory of everything’ for life? | Sara Walker | Big Think


    Finding aliens: Is there a ‘theory of everything’ for life?
    Watch the newest video from Big Think:
    Learn skills from the world's top minds at Big Think Edge:
    This video was produced in partnership with John Templeton Foundation.

    What, should it exist, is the universal law that connects all living things? To even dream of answering that question, and to one day find alien life elsewhere in the cosmos, humans must first reconcile the fact that our definition of life is inadequate.

    For astrobiologist Sara Walker, understanding the universe, its origin, and our place in it starts with a deep investigation into the chemistry of life. She argues that it is time to change our chemical perspective—detecting oxygen in an exoplanet's atmosphere is no longer sufficient enough evidence to suggest the presence of living organisms.

    Because we don't know what life is, we don't know where to look for it, Walker says, adding that an unclear or too narrow focus could result in missed discoveries. Gaining new insights into what life on Earth is could shift our quest to find alien life in the universe.

    Sara Walker is an astrobiologist and theoretical physicist interested in the origin of life and how to find life on other worlds. Walker is the deputy director of the Beyond Center for Fundamental Concepts in Science, associate director of the ASU-Santa Fe Institute Center for Biosocial Complex Systems, and assistant professor in the School of Earth and Space Exploration at Arizona State University. She is also co-founder of the astrobiology-themed social website

    Read Sara Walker's book From Matter to Life (Information and Causality) at

    SARA WALKER: We have, through science over the last 400 years, come to have a really deep understanding of the natural world. But so far that deep understanding doesn't include us. It's really important in an age when we're being faced with existential threats on a regular basis to understand our place in the cosmos. And I think unless we actually really address the question of 'What is life?' we're not really gonna understand ourselves in the context of the systems that we live in.

    Because we don't know what life is, we don't know where in the universe to look for it. My biggest worry is that we might just completely miss discovering it because we actually don't really have an idea what we're looking for. And we're thinking about the definitions of life the wrong way.

    I'm Sara Walker and I'm an astrobiologist. What that means is that I'm really interested in understanding if there's life elsewhere in the universe, but I'm also really interested in just understanding ourselves. And so most of my work is really focused on understanding the origin of life on Earth. To do that, my group is building ensembles of thousands of organisms and thousands of ecosystems and looking at properties of their chemistry.

    NARRATOR: On Earth, we're surrounded by life, but we have no idea how common or rare living systems are in the universe. We have no idea how many different forms life can take, no notion of what limits there are to its size or the timescales it operates on. We might've encountered alien life already and not recognized it.

    WALKER: There's this assumption that we make that because we are alive, we actually recognize life when we see it, or we understand what life is, and I think that's actually a really flawed viewpoint. For a long time, it was thought if we see oxygen in the atmosphere of an exoplanet, that is a sign of life, and we will be able to claim victory that we have discovered aliens. But as scientists thought about it a little bit more, it turns out you can make atmospheric oxygen pretty easily with simple models that don't even contain life. We really need a more general definition for life that doesn't depend on the specific chemistry that life on Earth uses but is more characteristic of what life is as a process that organizes chemistry and does all of the wonderful things that we associate with living matter.

    So I, for example, have a very broad definition of life that includes things like technology. Part of the reason for that is if you found a phone on Mars, you might not think that you discovered life, but you certainly would think you discovered evidence of life. Because the likelihood of that phone being there is zero without a living process putting it there. Life is literally the physics of creativity. It's the creative process in the universe. It's not an individual in that process...

    Read the full transcript at

  • This Harvard scientist believes alien life may be nearby


    Harvard science professor Avi Loeb says the shape of the object looks so peculiar, it may have an artificial origin.

    Subscribe to CTV News to watch more videos:

    Connect with CTV News:
    For the latest news visit:
    For a full video offering visit the CTV News Network:
    CTV News on Facebook:
    CTV News on Twitter:
    Watch CTV News on Twitter:
    CTV News on Google+:
    CTV News on Instagram:
    CTV News on Pinterest:

    CTV News is Canada's most-watched news organization both locally and nationally, and has a network of national, international, and local news operations.

  • Intelligent Life on Other Planets: What are the Odds?


    Title: Intelligent Life on Other Planets: What are the Odds?
    Speaker: Corbin Covault, PhD
    Date: October 29, 2019

  • Bizarre Alien Life Forms | Known Universe: Alien Contact


    Life on other planets would adapt to its environment and might be stranger than you could ever imagine.
    Known Universe: Alien Contact :
    ➡ Subscribe:

    About National Geographic:
    National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.

    Get More National Geographic:
    Official Site:

    Bizarre Alien Life Forms | Known Universe: Alien Contact

    National Geographic

  • There may be extraterrestrial life in our solar system - Augusto Carballido


    Is there extraterrestrial life in our solar system? Or are we alone? Take a journey to the ocean worlds on Jupiter and Saturn to investigate the possibility.


    Deep in our solar system, a new era of exploration is unfolding. Beneath the thick ice of Europa; in the vapor plumes on Enceladus; and within the methane lakes of Titan, scientists are hunting for extraterrestrial life. These moons are ‘ocean worlds’— they contain liquid oceans, which can support the formation of life. Does life exist on ocean worlds? Augusto Carballido explores the possibility.

    Lesson by Augusto Carballido, directed by Artrake Studio.

    Sign up for our newsletter:
    Support us on Patreon:
    Follow us on Facebook:
    Find us on Twitter:
    Peep us on Instagram:
    View full lesson:

    Thank you so much to our patrons for your support! Without you this video would not be possible! Dee Wei, Richard A Berkley, Tim Armstrong, Daniel Nester, Hashem Al, denison martins fernandes, Doug Henry, Arlene Spiegelman, Michał Friedrich, Joshua Wasniewski, Maryam Dadkhah, Kristiyan Bonev, Keven Webb, Mihai Sandu, Deepak Iyer, Javid Gozalov, Emilia Alvarado, Jaime Arriola, Mirzat Tulafu, Lewis Westbury, Felipe Hoff, Rebecca Reineke, Cyrus Garay, Victoria Veretilo, Michael Aquilina, William Biersdorf, Patricia Alves Panagides, Valeria Sloan Vasquez, Mike Azarkman, Yvette Mocete, Pavel Maksimov, Victoria Soler-Roig, Betsy Feathers, Samuel Barbas, Therapist Gus, Sai Krishna Koyoda, Elizabeth Parker, William Bravante, Irindany Sandoval, Mark wisdom, Brighteagle , Beatriz Inácio, Mighterbump, Pamela Harrison, Maija Chapman, Liana Switzer, Curtis Light, The Brock, Dianne Palomar and Edgar Campos Barrachina.

  • The Search for Primitive and Intelligent Life on Other Planets


    Professor Abraham (Avi) Loeb, chair of the Astronomy department, Harvard University.
    Are we alone? Probably not, out of modesty - keeping in mind that about a quarter of all stars host a habitable Earth-size planet. Upcoming searches for primitive life will aim to detect oxygen or methane in the atmospheres of transiting planets. Searches for intelligent life will aim to detect artificial signals in the radio or optical bands, as well as artifacts such as megastructures, solar cells that are used to re-distribute light and heat on tidally-locked planets, industrial pollution or artificial light beams. Our own civilization is starting to study the feasibility of interstellar travel using a powerful laser beam pushing on a lightweight sail, the so-called Starshot Initiative. If successful, we might receive a signal from outer space stating: welcome to the interstellar club!.

  • NASA Says Were on Verge of Finding Alien Life


    NASA's chief scientist Ellen Stofan predicts that scientists will find signs of alien life by 2025. WSJ's Monika Auger reports. Photo: NASA

    Subscribe to the WSJ channel here:

    Visit the WSJ channel for more video:

    More from the Wall Street Journal:

    Follow WSJ on Facebook:

    Follow WSJ on Google+:
    Follow WSJ on Twitter:
    Follow WSJ on Instagram:
    Follow WSJ on Pinterest:
    Follow WSJ on Tumblr:
    Don’t miss a WSJ video, subscribe here:

    More from the Wall Street Journal:
    Visit the WSJ Video Center:

    On Facebook:
    On Twitter:
    On Snapchat:

  • Extraterrestrial Life: Are We Alone?


    It's a question that we have pondered for years: is life on earth really the only life that's out there in the universe? Turns out there's a good chance it's not just us. With research indicating that other planets might be able to host life, how should we be thinking about interactions between extraterrestrial and Earth life? Planetary protection involves avoiding contamination of other locations in the universe with Earth life, as well as preventing unpleasant things happening when possibly-inhabited material is brought to Earth from other planets. How can we tell the difference between extraterrestrial and Earth life? What do we need to keep Earth safe, and other planets safe from contamination by us?

    Dimitar Sasselov Catharine Conley Tracy Day

  • The scientists looking for alien life | The Royal Society


    Join Professor Brian Cox in the search for extraterrestrial intelligence. We ask scientists from SETI how they are using radio telescopes to scan the skies for aliens.

    Produced by the Royal Society with thanks to the research teams involved in the Royal Society Summer Science Exhibition 2019 exhibit A message from afar. Discover more about their research at

    The Royal Society is a Fellowship of many of the world's most eminent scientists and is the oldest scientific academy in continuous existence. Visit our website to learn more:

    The Royal Society publishes leading science journals. Stay informed:

  • The Search for Alien Life | The Space Show


    Lisa Kaltenegger is the Director of the Carl Sagan Institute at Cornell and works from Sagan's old office. In this episode of The Space Show, she reveals how we may be just a few years away from answering humanity's greatest question: are we alone in the universe?

    Watch more from this series:

    Inside the Fastest Spaceship Ever Made

    NASA Is Building a Space Station Around the Moon

    Subscribe to MOTHERBOARD:

    More videos from the VICE network:

  • When will we find alien life? Place your bets! | Michelle Thaller | Big Think


    When will we find alien life? Place your bets!
    New videos DAILY:
    Join Big Think Edge for exclusive video lessons from top thinkers and doers:
    Want to place a bet on when we'll discover alien life? NASA's Michelle Thaller thinks it'll be within the next 50 years. I actually have a bottle of champagne chilling because I think it could happen almost any day, when some of our rovers or some of our satellites around other planets come back with really interesting data, says Thaller.

    What will our first proof of alien life be like? Most likely microbial, but even those microbes will reveal so much: Does it have DNA? Is it similar to us? Is it different from us? How else can life evolve? These questions—and answers—will change our view of the universe forever.

    Dr. Michelle Thaller is an astronomer who studies binary stars and the life cycles of stars. She is Assistant Director of Science Communication at NASA. She went to college at Harvard University, completed a post-doctoral research fellowship at the California Institute of Technology (Caltech) in Pasadena, Calif. then started working for the Jet Propulsion Laboratory's (JPL) Spitzer Space Telescope. After a hugely successful mission, she moved on to NASA's Goddard Space Flight Center (GSFC), in the Washington D.C. area. In her off-hours often puts on about 30lbs of Elizabethan garb and performs intricate Renaissance dances. For more information, visit

    MICHELLE THALLER: So, Stephanie, you ask a great question: How likely is it that we're going to find life on a planet outside the Earth in your lifetime, say in the next 40 or 50 years? And, of course, this is something that nobody can answer exactly. We don't know, that's the answer. But I think it's very likely indeed. Now, when I say life, there's a lot of ways you can take that word. I'm not really talking about civilizations or spaceships or things like that; I think it's much more likely that we're going to find microbes, simple life—but to me, that would be really, really exciting. There are several places in our own solar system right now that we think might be good environments for life. And, as I said before, we haven't found proof of life yet, but we found some very, very interesting things. For example, on Mars—Mars has an atmosphere that's much thinner than the Earth's, but it is still there; we think there might even be water underneath the surface of Mars. And recently we've detected organic molecules, which are sort of the building blocks of our chemistry, on Mars as well. It's possible that the surface of Mars itself is not a very good place for life, but maybe underneath, meters under the soil in the rock you could find bacteria. And there a lot of analogs to this on Earth, similar things on Earth. We find bacteria that can exist a mile under the Earth, we find these things in gold mines very, very deep under the Earth. You break open the rocks and there's actually bacteria living in the rocks very far down into the Earth.

    There are other places in the outer solar system that we think are great environments for life, too. There are moons of Jupiter and Saturn that we know have liquid water oceans. For example, Europa is a moon of Jupiter and we know that Europa has vast reservoirs of liquid water that are protected by a shell of ice. In fact, this one moon of Jupiter, Europa, actually has far more liquid water on it than Earth does. And there are some suggestions that there might be interesting chemistry as well. There's also a moon of Saturn called Enceladus. And the same thing applies: There's liquid water under ice. And in the case of Enceladus, you actually have cracks in the ice that the water is flying out of and turning into ice crystals. We actually flew our Cassini spacecraft through these jets coming out of Enceladus and we detected organic molecules, so we know that there is warm salt water, there's interesting chemistry—it's a great place to go looking for life. And there's another moon of Saturn too, called Titan, which is very different from that; it has an atmosphere. We actually think that there are lakes of methane, not water but actually liquid methane on the surface. And below that, there's probably liquid water underneath. So you have liquid water, you have organics, you have an atmosphere—maybe that would be a great place to go looking for some microbes.

    So some people say that's not very exciting; we're not going to find aliens in the sense of spaceships and Klingons and any science fict...

    For the full transcript, check out

  • Top 10 Upcoming Missions to Find Alien Life


    Check out our featured song: Despair, Too by Po Lazarus!

    Aliens: real or not? We might just find out sooner than you think. For this list, we’re looking at the most exciting upcoming missions that will search for signs of extraterrestrial life. Our countdown includes Rocket Lab Photon, Dragonfly, Europa Clipper, and more! Is alien life out there? Which mission are you most excited about? Let us know in the comments.

    Watch more great aliens videos here:
    Top 20 Scariest Movie Aliens:
    Top 10 Military Sightings of UFOs:
    Top 10 CREEPIEST Real-Life Alien Abduction Stories:

    Have Your Idea Become A Video!

    Subscribe for more great content!

    Visit WatchMojo Club for Great Deals!

    Your trusted authority for Top 10 lists, reviews, tips and tricks, biographies, origins, and entertainment news on Film, TV, Video Games, Comics, Celeb, Music and Superheroes.


  • What Could Alien Life Really Look Like?


    The Fight To Save New York Subway Dancers:

    Alien life might be so odd that we wouldn’t even recognize it! So what will it look like?

    Follow Amy on Twitter:

    Read More:
    Could This Alien Cell Thrive on Titan?

    “In a world first, chemical engineers have taken a different look at a question astronomers and biologists have been pondering for decades: Does Saturn moon Titan host life?”


    “In many respects, Saturn's largest moon, Titan, is one of the most Earth-like worlds we have found to date. With its thick atmosphere and organic-rich chemistry, Titan resembles a frozen version of Earth, several billion years ago, before life began pumping oxygen into our atmosphere.”

    Life ‘not as we know it’ possible on Saturn’s moon Titan

    “A new type of methane-based, oxygen-free life form that can metabolize and reproduce similar to life on Earth has been modeled by a team of Cornell University researchers.”

    Discovery Of “Arsenic-Bug” Expands Definition Of Life

    “NASA-supported researchers have discovered the first known microorganism on Earth able to thrive and reproduce using the toxic chemical arsenic. The microorganism, which lives in California's Mono Lake, substitutes arsenic for phosphorus in the backbone of its DNA and other cellular components.”

    DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily.

    Watch More DNews on TestTube

    Subscribe now!

    DNews on Twitter

    Trace Dominguez on Twitter

    Julia Wilde on Twitter

    DNews on Facebook

    DNews on Google+

    Discovery News

    Download the TestTube App:

  • The Ingredients For Alien Life


    What conditions on other worlds could support life? Biochemist Jack Szostak and cosmologist Paul Davies talk about the potential makeup of extraterrestrials in this clip from the 2014 World Science Festival program Alien Life: Will We Know It When We See It?

    Watch the Full Program Here:
    Original Program Date: May 31, 2014

    Subscribe to our YouTube Channel for all the latest from WSF.
    Visit our Website:
    Like us on Facebook:
    Follow us on twitter:

  • What scientists think aliens could look like


    We've all wondered whether aliens actually exist – and if they do what exactly do they look like? We compiled information from some of the world's leading scientists to give you a glimpse into what they think intelligent life could actually look like and the answer could surprise you.


    Follow BI Video on Twitter:
    Follow BI on Facebook:
    Read more:


    Business Insider is the fastest growing business news site in the US. Our mission: to tell you all you need to know about the big world around you. The BI Video team focuses on technology, strategy and science with an emphasis on unique storytelling and data that appeals to the next generation of leaders – the digital generation.



Check Also