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Why we might be alone in the Universe

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  • Why we might be alone in the Universe

    24:58

    There are trillions upon trillions of stars and worlds in our Universe. Faced with such large numbers, it's tempting to conclude that there must surely be other life out there, somewhere. But is this right? Could the probability of life beginning be a number so small that we are alone? A video essay by Professor David Kipping.

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    Further reading and resources:
    ► Chen, Jingjing & Kipping, David (2018), On the Rate of Abiogenesis from a Bayesian Informatics Perspective, Astrobiology, 18, 12:
    ► Hanson, Robin (1998), Must Early Life Be Easy? The Rhythm of Major Evolutionary Transitions:
    ► Benzene in space materials and story:
    ► Columbia University Department of Astronomy:
    ► Cool Worlds Lab website:

    Music is largely by Chris Zabriskie ( and is licensed under a Creative Commons Attribution license ( in order of appearance;
    ► The Sun is Scheduled to Come Out Tomorrow (
    ► Music from Neptune Flux, We Were Never Meant to Live Here (
    ► Cylinder Five (
    ► Music from Neptune Flux, Stories About the World That Once Was (
    ► Waking Up by Atlas, licensed through SoundStripe.com:
    ► Cylinder Two (
    ► Piano cover of S.T.A.Y. (Hans Zimmer) byt Jordie Eskes:

    Video materials used:

    ► Intro/outro video by Miguel Aragon of Johns Hopkins University with Mark Subbarao of the Adler Planetarium and Alex Szalay of Johns Hopkins using Sloan Digitial Sky Survey data:
    ► Bacteria videos from Nikon Small World competition: and
    ► Tour of the J. Craig Venter Institute by Hedrich Blessing Motion and Sound:
    ► Tardigrade footage:
    ► Yellowstone park footage:
    ► Bill Nye interview with Rita Braver aired on CBS Sunday Morning July 10 2016:
    ► Neil deGrasse Tyson interview with Charlie Rose aired on PBS May 26 2015:
    ► Carl Sagan interview with Charlie Rose aired on PBS May 27 1996:
    ► Brian Cox interview on This Morning, ITV aired December 2 2014:
    ► Milky Way animation by Stefan Payne-Wardenaar:

    Films clips used:
    ► Star Trek: The Next Generation
    ► Them! (1953)

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  • Why We are Alone in the Galaxy | Marc Defant | TEDxUSF

    17:30

    NOTE FROM TED: We've flagged this talk, which was filmed at a TEDx event, because it appears to fall outside TEDx's curatorial guidelines. The sweeping claims and assertions made in this talk are based on the speaker’s own theory and lack legitimate scientific support. TEDx events are independently organized by volunteers. The guidelines we give TEDx organizers are described in more detail here:


    The origin of intelligent life on earth requires a host of statistically improbable events which may imply that similar intelligent life elsewhere is extremely unlikely, a fact mostly ignored in discussions about contacting extraterrestrial life.

    “Marc Defant is a professor of geochemistry at USF and studies volcanoes through various funding such as the NSF and National Geographic. He has published research in Nature and other journals and has written a book on the history of the universe, earth and life. He was the keynote speaker at a conference on granitic rocks in China and was one of the first American scientists to work on volcanoes in Kamchatka when it was part of the Soviet Union. He is currently focused on emphasizing the importance of science in society.”

    This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at

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  • Why We May Be Alone in the Universe

    18:34

    Today, we discuss the possibility of humanity being alone in the galaxy or perhaps even the greater universe. We consider just how improbable our existence is by evaluating both the number of potential sites for life within our galaxy alone as well as the probability of abiogenesis occurring elsewhere.

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    ►Written, Produced & Narrated by David
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    Music:
    “Cylinder Five” by Chris Zabriskie
    “Cylinder Eight” by Chris Zabriskie
    “Stories About the World That Once Was” by Chris Zabriskie

  • 10 Space Discoveries of 2020 Show We Might Not Be Alone

    10:01

    Astronomers from MIT registered a repeating signal from 500 million light years away. Such signals are called fast radio bursts, or FRBs, and they’re usually singular events. No one knows what their sources are, but they could be supernovae or bursts of energy from quasars. This repeating one, though, is pretty creepy because it’s regular: for four days, radio equipment captures signals all the time, and then they abruptly stop. But after 12 days, the same pattern begins: 4 days of constant radio bursts and 12 more days of silence.

    Astronomers managed to locate the signal as coming from a galaxy half a billion light years away from us, but what causes it is still unknown. It may be a spinning quasar or a supermassive black hole, but an alien technology is not excluded either. By the way, there just might be about 6 billion Earth-like planets in the Milky Way galaxy alone. The latest data has shown that every fifth Sun-like star can have at least one planet in its habitable zone! Okay, here's the most amazing news from the further reaches of outer space.

    #brightside

    TIMESTAMPS:
    The Moon is rusting 0:01
    Unexplained radio signal 1:47
    Earth-like planets 2:52
    Life on Venus? 3:52
    A doppelganger to Earth 4:50
    A pattern in Earth’s climate variations 7:01
    Did oil come from outer space? 8:04

    Music by Epidemic Sound

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  • The Fermi Paradox — Where Are All The Aliens?

    6:21

    The universe is unbelievably big – trillions of stars and even more planets. Soo… there just has to be life out there, right? But where is it? Why don’t we see any aliens? Where are they? And more importantly, what does this tell us about our own fate in this gigantic and scary universe?


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  • A Physicist Has Explained Why Weve Never Seen Aliens

    10:26

    Recently, astronomers were able to map about 1 billion stars around us. Sounds impressive, but that’s less than 1% of the total stars in the Milky Way. So it’s statistically impossible for us to be the first intelligent species in the galaxy! But if there absolutely should be developed civilizations in the Universe, then where is everybody?

    We’ve been looking for about 70 years for any sign of extraterrestrial life, or any communication from little green men or whatever they are. And we still have absolutely nothing to show for it. How is this possible? That exact question was once asked by famous Italian physicist Enrico Fermi, the creator of the first ever nuclear reactor.

    Other videos you might like:
    A Scary Island That Has Been Keeping a Secret for 80 Years
    Stephen Hawking’s 7 Predictions of Earth’s Demise in the Next 200 Years
    5 Bermuda Triangle Mysteries You'll Never Know the Truth About

    TIMESTAMPS:
    Are we alone in the universe? ???? 1:40
    What the Great Filter is 2:16
    Why Jupiter is HUGELY beneficial to us 3:35
    The Rare Earth Hypothesis ???? 4:51
    Intelligence isn't enough 5:49
    If aliens are out there, why we can’t communicate with them? 6:45
    Are they already around us? ???? 9:17

    #aliens #space #brightside

    Music by Epidemic Sound

    SUMMARY:
    - The Fermi Paradox has a lot of potential solutions. The first group is all about two big ideas: The Rare Earth Hypothesis and the idea of the Great Filter.
    - Can you imagine, how much would have to fall into place for an advanced civilization to rise to our level? Let’s just say we hit a jackpot in all categories.
    - Jupiter is hugely beneficial to us. Its mass attracts all the space debris, meteors and comets like a giant vacuum cleaner. If not for it, the Earth would be bombarded with giant space rocks all the time.
    - The size of our planet and its speed of rotation make an optimal day and night cycle. Our planet has lots of chemical elements, crucial for the development of life.
    - Eventually, it’ll have beings that look at the skies from time to time and think that they probably aren’t alone in the Universe.
    - But these intelligent folks still won’t be the ultimate winners of this universal lottery. They still must develop technology to go into space and send signals.
    - Another solution is far more optimistic. Aliens are out there, but we just can’t communicate properly with them.
    - What if they went through a significantly different route in technology; one that’s not even comprehensible for us. What if they did so because their own communication is different than ours?
    - The next solution is far more possible. In basic terms, it proposes that we aren’t alone, but we are the first to advance our civilization to the needed level of technology.
    - There’s also a funny argument that aliens are so unlike humans in their way of thinking that they simply don’t want to communicate with anyone else.
    - And finally, the solution all fans of UFOs want to believe in – they really are common in the galaxy, but they can hide from us and maybe they’re already around us.

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  • Where are all the aliens? | Stephen Webb

    13:19

    The universe is incredibly old, astoundingly vast and populated by trillions of planets -- so where are all the aliens? Astronomer Stephen Webb has an explanation: we're alone in the universe. In a mind-expanding talk, he spells out the remarkable barriers a planet would need to clear in order to host an extraterrestrial civilization -- and makes a case for the beauty of our potential cosmic loneliness. The silence of the universe is shouting, 'We're the creatures who got lucky,' Webb says.

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  • #1 Anders Sandberg - We may be alone in the universe

    58:31

    In the first episode of Bold Conjectures, I talk to Dr Anders Sandberg who is a Senior Research Fellow at Future of Humanity Institute, Oxford University. His academic collaborators include nanotechnology pioneer Eric Dexler and the philosopher Nick Bostrom.

    The audio quality isn't perfect in this one as this is my first podcast. It should get better from here :)

    == We talk about ==

    1:42 - How to predict the future using history and science-fiction
    13:00 - Why talking about probabilities is tricky
    17:45 - How to make people care about very distant future
    21:10 - Existential risks for humanity
    26:45 - Why we may be alone in the observable universe
    31:35 - Why the emergence of life is a rare phenomenon
    32:25 - What evolutionary transitions need to happen for intelligent life to emerge
    35:35 - Do observers evolve first or do the stars burn out first?
    40:00 - Humans arrived relatively late in Earth’s history
    41:10 - Prediction #1: There’s no life on red dwarf stars
    45:25 - Prediction #2: If we find life on Mars, it’ll share a common descendent with life on Earth
    47:20 - Why does the Future of Humanity Institute care about alien life?
    48:15 - How long does the intelligent life last?
    50:57 - Maybe we’re the first intelligent life in the universe?
    56:07 - What should we do if we’re the only ones in the universe?
    57:00 - Humans matter because we may be alone

    == Papers by Dr Anders Sandberg mentioned in the episode ==

    - The Timing of Evolutionary Transitions Suggests Intelligent Life Is Rare
    - Dissolving the Fermi Paradox
    - Blueberry Earth

    == Links ==

    Paras Chopra:
    Anders Sandberg:
    Future of Humanity Institute:
    Tabby's star:

    == Credits ==

    Thanks to Sachin Vats ( for editing

  • Are We Alone In The Universe?

    3:02

    Is Earth the only planet supporting life? Where are the aliens hiding?
    Watch More: What Will Happen When The Sun Dies? ►►►►

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  • Another Universe May Have Bumped Into Ours and We Might Have Proof

    4:24

    The Cold Spot in the cosmic microwave background radiation has led astronomers to speculate the possibility of parallel universes.

    What Is Beyond The Universe? -
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    Universe Older Than Thought, New Map Reveals

    Astronomers first discovered the CMB by accident in 1964, and have been studying it ever since because of the precious clues about the universe's beginnings embedded in it.

    Our Universe Has 10-20 Times More Galaxies Than Thought

    A new headcount of galaxies in the observable universe turned up 10- to 20 times more galaxies than previous estimates, bringing the tally up to as many as 2 trillion, a new study shows.

    Multiverse: have astronomers found evidence of parallel universes?

    Each alternate universe carries its own different version of reality. There will be one where you wrote this column and I read it; one where the Guardian is an alt-right propaganda rag; even a really weird one in which Donald Trump uses twitter to spread nothing but amusing cat videos.

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  • Are we alone in the Universe? | Kevin Heng | TEDxBern

    16:57

    Are we alone? This is one of the oldest questions in human history.
    A more modern take on the question is: How can we scan the universe? he Singaporean Kevin Heng is a Professor for Astronomy and Planetary Physics at the University of Berne and Director for the Centre for Space and Habitability (CSH). He writes columns for the American Scientist Magazin and has written a textbook about the Atmospheres of Exoplanets. In order to observe these planets closer-up, he would love to be able to travel faster than light. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at

  • Are We Alone in the Universe?

    2:06

    Is Earth the only planet that currently supports life? Scientists are continuing to search for signs of alien life, and the James Webb Space Telescope will play an important role in their search.

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  • Why The Universe May Be Full Of Alien Civilizations Featuring Dr. Avi Loeb

    1:27:02

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    In our first episode of John Michael Godier's Event Horizon, we discuss the possibility of Alien civilizations moving to Galaxy Clusters to make the best use of mass and energy, why making copies of ourselves may be the key to interstellar travel and colonization, the habitability of planets around red dwarf stars such as Proxima Centauri, Black Holes, and so much more with our first guest Harvard Theoretical Physicist Dr. Avi Loeb, the Frank B. Baird Jr. Professor of Science at Harvard University.

    Is Oumuamua a Light Sail? With Avi Loeb:

    Dr. Avi Loeb’s website


    From the First Star to Milkomeda By Dr. Avi Loeb


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  • My UFO Encounters Prove Were Not Alone In The Universe & Aliens Exist: Jo Wood | Loose Women

    7:00

    Jo Wood joins Brenda, Gloria, Kaye and Janet to talk about why she firmly believes in extraterrestrials and UFOs as she claims to have had no less than three encounters with aliens. She shares the details and tells the panel why these sightings have changed her life.
    From series 25, broadcast on 06/04/21

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    Join our panellists as they share their lives and talk about everything from friendships to relationships, parenting to politics, mental health and much, much more. Tune in to find out what your favourite Loose Women have been up to, watch exclusive interviews with showbiz stars, and get a much needed laugh at lunchtime.




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  • Is There Life Beyond Earth? – Sadhguru Answers

    4:05

    Are we alone in the universe? Sadhguru answers a question that has been bothering generations of stargazers and astrophysicists alike.

    #Sadhguru
    Yogi, mystic and visionary, Sadhguru is a spiritual master with a difference. An arresting blend of profundity and pragmatism, his life and work serves as a reminder that yoga is a contemporary science, vitally relevant to our times.

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  • Why We May Be Surrounded by Older Alien Civilizations

    33:12

    Are alien civilizations likely to be younger or older than us in age? A basic question that seems insurmountable until we start detecting them. But even before that, we can use some logical deduction using lifetime distribution statistics to determine the most plausible answer to this question. Join us today for an explanation of our new research paper on this topic.

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    Thank-you to Kevin Clark, Tom Widdowson, Denny Smith, Stephanie Hackley, Mark Sloan, Laura Sanborn, Kolos Kantor, Patrick Herman, Abel Aganbegyan, Claudio Bottaccini, Daniel Brunk, Douglas Daughaday, Scott Fincher, James Kindred, Andrew Jones, Jason Allen, Steven Baldwin, Jason Black, Stuart Brownlee, Shivam Chaturvedi, David Denholm, Tim Dorais, Glen Downton, Eneko Xabier, Elizondo Urrestarazu, Gordon Fulton, Sean Griffiths, Peter Halloran, John Jurcevic, Niklas Kildal, Jack Kobernick, Wes Kobernick, Valeri Kremer, Marc Lijoi, Sheri Loftin, Branden Loizides, Anatoliy Maslyanchuk, Blair Matson, Ocean Mcintyre, Laini Mitchell, Jeffrey Needle, André Pelletier, Juan Rivillas, Bret Robinson, Zenith Star, Lauren Steely, Ernest Stefan-Matyus, Mark Steven, Elena West, Barrett York, Tristan Zajonc, Preetumsingh Gowd, Shaun Kelsey, Chuck Wolfred, David Vennel, Emre Dessoi, Fahid Naeem, Francisco Rebolledo, Hauke Laging, James Falls, Jon Adams, Michael Gremillion, Pierce Rutherford, Trev Kline, Tristan Leger, Lasse Skov, Takashi Hanai, Drew Roberts, Erynn Wilson, Ian Baskerville, Jacob Bassnett, John Shackleford, Marcus Undin, Martin Kroebel, Ian Johnstone, Geoff Suter, Ian Hopcraft, James Valdes, Phil Akrill-Misso, William Robertson, Elizabeth Orman & Giles Ingham.

    Video on planet cloaking:

    ::References used::
    ► Kipping, Frank & Scharf, 2020, Contact Inequality -- First Contact Will Likely Be With An Older Civilization, International Journal of Astrobiology:
    ► Benton, M. J., 1993, “The Fossil Record”, Vol 2 (Chapman & Hall, London, 1993)
    ► Civilization lifetimes figure from BBC Future/Nigel Hawtin:

    ► Olson et al., 2014, Survival Probabilities of Adult Mongolian Gazelles, Journal of Wildlife Management, 78, 1:
    ► Battery lifetime figure from BatteryUniversity.com:


    ::Movies clips used::
    ► Master & Commander: The Far Side of the World (2003) 20th Century Fox
    ► Noah (2014) Paramount Pictures
    ► Avatar (2009) 20th Century Fox
    ► Contact (1997) Warnos Bros. Pictures
    ► GI Joe Retaliation (2013) Paramount Pictures
    ► Terminator 3 (2003) Warners Bros. Pictures
    ► The House (2017) Warners Bros. Pictures
    ► X2 (2003) 20th Century Fox
    ► The Pursuit of Happyness (2006) Sony Pictures Releasing
    ► Into The Wild (2007) Paramount Vantage
    ► 300 (2006) Warner Bros. Pictures
    ► Cleopatra (1963) 20th Century Fox
    ► Gladiator (2000) Dreamworks Pictures

    ::TV clips used::
    ► Andrew Marr's History of the World - BBC
    ► Star Trek the Next Generation - Paramount Television

    ::Other video footage used::
    ► See

    ::Music::
    Music used is licensed by SoundStripe.com (SS) [shorturl.at/ptBHI], or via Creative Commons (CC) Attribution License ( or with permission from the artist.
    ► Shade Upon Thy Right Hand by Hill, used with permission from the artist:
    ► Fable by Stephen Keech licensed via SS
    ► Cylinder Five by Chris Zabriskie licensed under a CC Attribution license:
    ► Painted Deserts by Shimmer licensed via SS
    ► It's Always Darkest Before the Dawn by Hill licensed via SS
    ► Cylinder Four by Chris Zabriskie licensed under a CC Attribution license:
    ► We Were Never Meant to Live Here by Chris Zabriskie licensed under a CC Attribution license:
    ► Fragmented by Hill, used with permission from the artist:
    ► Stories About the World That Once Was by Chris Zabriskie licensed under a CC Attribution license:
    ► Waking Up by Atlas licensed via SS
    ► Ticking by Alternative Endings licensed via SS
    ► Trace Correction by Indive licensed under a CC Attribution license:

    0:00 Prologue
    1:22 Technological Lockstep
    6:57 Distribution of Civilization Lifetimes
    19:17 Bayes vs The Cosmos
    23:39 Temporal Bias
    32:20 Credits

    #CivilizationLongevity #AncientAliens #CoolWorlds

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

    44:28

    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
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  • Why We Might Be Alone in the Universe

    15:59

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    Why does it appear, that humanity is the lone intelligence in the universe? The answer might be that planet Earth is more unique than we've previously assumed. The rare earth hypothesis posits exactly this - that a range of factors made Earth exceptionally unusual and uniquely able to produce intelligent life.

    In upcoming episodes we’ll be exploring the anthropic principle and its two main versions - the strong and the weak anthropic principles. The strong anthropic principle tells us that the observed universe must be able to produce observers - including the contentious idea that this predicts the existence of universes beyond our own. But in today's episode we’re going to focus on the weak anthropic principle. It says that we must find ourselves in a part of the universe capable of supporting us. For example, in a planetary biosphere rather than floating in the void between the galaxies. This may seems tautological, but accounting for this observer selection bias is important to understanding why the universe looks the way it does from our perspective. And the weak anthropic principle is much more useful than that. When combined with the apparent absence of alien civilizations, it may tell us why intelligent life is incredibly rare in our universe.

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  • Why we might be alone in the universe | Max Tegmark and Lex Fridman

    12:53

    Lex Fridman Podcast full episode:
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  • Are we Alone in the Universe? Perhaps yes, and heres why.

    5:33

    New video with less provocative conclusion here: . Are we alone in the universe? 5 Reasons we are (probably) completely alone in the universe. A government funded program called SETI, or the Search for Extra Terrestrial Intelligence has been listening for intelligent life in the universe, with their radio telescopes, for past 50 years, but so far NOTHING has been found.

    Is it possible that the hundreds of scientists around the world that are looking for intelligent life are on a futile mission to nowhere –because there is actually NO OTHER intelligent species in the entire universe – The shocking answer could be – YES. I’ll explain why.

    There are more stars and planets in the universe than all the sands on all the beaches of the world. How is it possible that we could be the only intelligent life out there. I am talking about intelligent life, not just any kind of life. I think ordinary life is probably everywhere in the universe, and I predict there is life within our own solar system. See my other video on this subject. Intelligent life is a completely different animal, no pun intended, than simple forms of life like bacteria and viruses. There is a good chance that there is NO other intelligent life…and here are 5 reasons why:

    5) Earth has a very large moon compared to its home planet. And this moon was formed due to a colossal impact with another planet early in earth’s history. This collision caused the earth to almost completely melt, which led to molten iron being pulled to the center of the earth. The reason this is important is because it is the flow of this iron that allows earth to have a relatively strong magnetic field. Without this field, life would not exist, because cosmic rays would have wiped out any early life. The moon also gives the earth orbital stability, and has absorbed potential meteor impacts that would have otherwise devastated earth. Such massive collisions are probably rare in the universe.

    4) There was a massive extinction event that occurred on earth about 500 million years ago – long before the age of the dinosaurs.Over 80% of all life on earth was wiped out. But luckily for us, a tiny creature less than 2 inches long, called Pikaia, which had a backbone, survived. This creature is the ancestor of all animals with a backbone – including us. If it had not survived that extinction, we would not be here.

    3) For over a 100 million years, mammals were small mousey shrew-like creatures that lived under the shadow of the dinosaurs. They only came out at night because during the day, they would be easy prey for the huge dominant species of the day - dinosaurs. The only reason mammals dominate the earth today, and by the way, we are the most dominant of the mammals, is because the dinosaurs were wiped out by a huge 6-mile-wide asteroid that fortuitously killed our overlords, about 65 million years ago. It if wasn’t for that lucky asteroid, we wouldn’t be here.

    2) Arid conditions hit East Africa millions of years ago. It didn’t happen anywhere else, but only in East Africa. It so happens, that living in east Africa at that time were tree dwelling apes, that were forced to leave the trees and journey into the grasslands below to find food to eat. Not only did this force these primitive primates to stand upright, which freed up their hands for using tools, but it also forced a huge increase in brain size… Because these animals needed a much bigger brain, and higher processing power to help them find food. We are a direct descendant of these primitive apes. If these arid conditions had occurred anywhere else on the globe, it would not have resulted in us.

    1) There have been millions of species of animals that have lived on earth. In fact, many more animals have gone extinct on earth than are living today. But out of all those species of animals that have evolved nearly every feature and trait that you can think of….only ONCE. That’s right, only ONCE has the trait of higher intelligence evolved. We are the only animals that have ever lived on earth over its 4 billion year life-span, that has evolved to be super intelligent. Intelligence is by no means an inevitability in the course of biological evolution. If it was, then there would have been many such evolutions of highly intelligent species who would have inhabited the earth over its 4 billion year life span.

    Had we not had many strokes of luck and multiple events going our way, we would not be here at all. Thus, it is quite possible that we may be listening with our radio telescopes to complete silence because there is no one else out there…other than us…imperfect humans on a tiny rock…orbiting an unremarkable star…in an ordinary galaxy…in a generic point in the universe. All we have is each other. So, there is a cosmic reason that we should be kind to each other.

  • x
  • 3 Reasons We May Be Alone In The Universe

    4:17

    The universe is a truly huge place and, certainly, our planet isn’t the only one with living things on it, right? It’s tough to say for sure, but here are three reasons that we, in fact, could be all alone.

  • Why We May Be the Only Intelligent Life in the Universe with David Kipping of Cool Worlds

    54:04

    Are We Alone? Are we the only intelligent life in the universe? Are there alien civilizations?

    Prof. David Kipping of the Cool Worlds lab at Columbia University spoke with John Michael Godlier about his most recent paper. What are the odds for intelligent life? Are there alien civilizations in the galaxy? Or are the odds against intelligent life?

    Prof. Kipping attempts to find answers to these questions using a Bayesian Analysis to look at life’s early start and our late arrival. The rare earth hypothesis argues that the origin of life and the evolution of biological complexity required an improbable combination of astrophysical and geological events and circumstances.

    Watch and subscribe to the Cool World's channel:
    The Odds of Life and Intelligence:

    Join the search for vanishing stars here:

    Kipping, D. 2020, An Objective Bayesian Analysis of Life’s Early Start and Our Late Arrival, PNAS:

    Carter, B. 2007, Five or six step scenario for evolution?, Int. J. Astrobiology 7, 177:

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  • What if We ARE Alone in the Universe?

    6:01

    What if We ARE Alone in the Universe? – Second Thought
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    We’re going to do something a little different today! In this video we’ll engage in a simple thought experiment and consider what would change if we knew we were alone in the universe, as well as two modifications of that premise. Make sure to leave a comment with your thoughts!

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  • Neil deGrasse Tyson: Are We Alone in The Universe?

    10:13

    Neil deGrasse Tyson explains the possibility of life existing elsewhere in the Universe. He explains where the elements that make up life on Earth come from. And how that has profound implications about the prevalence of life in the Universe. Certainly the question Are we alone in the Universe has got to be among the oldest, most fascinating and awe inspiring questions in science that remains unanswered. But Neil deGrasse Tyson paints a very interesting cosmic picture about life itself and why most astrophysicists indeed accept the probability of the existence of extraterrestrial life is high. At the very end he also has what he calls a disturbing and thought provoking question for the viewers.

    So far, the only life we know of is right here on our planet Earth. Yet, there are compelling arguments to suggest we are not alone.
    There are thousands of exoplanets that have been confirmed to exist in our galaxy and the likely number could be in the trillions.

    Given how long life has had to evolve on Earth, it is possible that there are beings on other worlds that are even more advanced than we are. That would certainly have implications for our understanding of the origins of life.

    A new study however, suggests that alien civilizations destroy themselves through progress, meaning our galaxy could be full of dead alien civilizations.

    With a limited understanding of how life originated on Earth, and with so little understanding of what kind of life there is elsewhere in the universe, it is not too surprising we don’t know what we are going to find out there. But it seems very likely that other life will have developed in different ways to that which evolved on Earth.

    So, are we alone in the universe? As Arthur C. Clarke has pointed out “Two possibilities exist: either we are alone in the universe or we are not. Both are equally terrifying.

    #life #neiltyson #science

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    Sources:
    Cosmic Quandaries with Dr. Neil deGrasse Tyson at St Petersburg College:

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  • Are You Alone?

    6:44

    Are you alone? To answer this question we have to take a look what you are first. What are you made of and where you stand in this universe. Are you your body? Your atoms? And how are your parts connected to the big picture?

    Special thanks to James Gurney for checking out our script. Take a look at his youtube channel:

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  • why we seem to be alone in the universe...

    59

    hey it's me gabe (@gabesweats) from tiktok! in this video i go over the great filter and why we seem to be alone in the universe... make sure to subscribe if you like this content :)

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  • Are We Really Alone In The Universe? | Answers With Joe

    19:58

    Get Curiositystream for free for 30 days if you go to

    The Rare Earth Hypothesis is the idea that the conditions that created life on Earth are so specific to this planet that it can't happen anywhere else in the universe. Here's some of the evidence to back this up.


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    ====================

    The Rare Earth Hypothesis something of a solution to the Fermi Paradox that points to several characteristics of Earth that may be required to keep life stable long enough to become intelligent, and these several traits may be incredibly unique in the universe, making intelligent life in the universe incredibly rare.

    Some of these factors include:

    Special place in the Milky Way
    It turns out our position in the Milky way might be beneficial as the low star density prevents other stars from messing up our orbits.

    The right type of star.
    Our sun is a G2 main sequence star that remains stable for a very long time.

    Rocky planet in the Goldilocks zone
    Earth is just the right distance from the sun to form liquid water.

    Magnetic Shield
    We're the only rocky planet with a magnetic shield protecting us from solar radiation.

    Jupiter
    Jupiter and the outer gas giants protect us from asteroid and comet impacts, and this might be rare in the universe.

    Tectonic activity
    We're the only planet with tectonic plates constantly rebuilding the crust.

    LINKS LINKS LINKS:

    Gigapixels of Andromeda video:


    My previous video on the Fermi Paradox:






  • Are We Alone in the Universe? | Ask an Expert

    2:27

    Is there other life 'out there'? Professor Phil Bland, of Curtin University's Space Science & Technology Centre, explains why he's hopeful.

    Learn more about the Space Science & Technology Centre:

    Discover more answers to the questions you've always been curious about in our new series Ask An Expert:

    #CurtinResearch #AskAnExpert

  • Galaxy-Scale Catastrophes...Why We Might Be Alone in the Universe - Professor Brad Gibson

    31:17

    Galaxy-Scale Catastrophes...why we might be alone in the Universe by Professor Brad Gibson (University of Hull) on 09/02/2018.

  • What If Were Alone In The Universe? | Unveiled

    7:21

    What If We Are Alone In The Universe?
    Subscribe:

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    What Would Happen If The Sun Suddenly Disappeared?


    The question whether life exists elsewhere other than just on Earth has remained a mysterious one for quite some time. It is doubtful that we are alone taking into consideration the limitless and vastness of the universe. If anything, the last two decades have revealed more to humans about the universe than ever before.

    Many thanks to the Kepler Space Telescope. Discoveries that were made a while back indicate that on average there is one planet orbiting every star in the immense universe. Notably, it is correct to say that there are more than 100 billion planets in our galaxy alone. With a hundred billion galaxies in the universe, the total number of planets in the universe is unimaginable.

    However, to conceptualize how vast the universe is, astronomers believe there are 10,000,000,000,000,000,000,000 (10 to the power of 22) planets in the whole universe.

    The National Aeronautics and Space Administration (NASA), for instance, in 2014 discussed the search for Earth resembling planets. These Earth-like planets could be hosting life. The space agency reckoned that in a few decades to come, the suspicions that indeed humans are not alone are going to be proved if not confirmed. In that same year, the Kepler Space Telescope recorded information of planets much like the Earth. The most exciting thing about these planets is that they are in what is called the “habitable zone” of a star.

  • Are we Alone? Part II ft Osama Ali | Junaid Akrams Podcast#88

    1:57:14

    Description:
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    Sequel of our previous discussion, Are We Alone in this universe, Osama Kalar discusses various theories trying to find connection of how humanity has come this far.

    Don't forget to subscribe my channel. You can now also get memberships to my YouTube channel.

    DISCLAIMER:
    ▀▀▀▀▀▀▀▀▀
    The views and opinions expressed in this video and comments do not necessarily reflect or represent the views and opinions by this channel's broadcaster.

    List of topics:
    ▀▀▀▀▀▀▀▀▀
    00:00-00:35 – Disclaimer
    00:35-02:42 – Intro
    02:42-05:18 – PIA spotted UFO
    05:18-09:01 – Project Blue Book
    09:01-16:00 – Is Elon Musk an Alien?
    16:00-18:22 – Osama’s encounter with Alien.
    18:22-19:19 – Ridiculing new ideas
    19:19-27:00 – Double Slit Experiment
    27:00-28:47 – Law of Attraction
    28:47-34:05 – Does Quran explains complex theories?
    34:05-39:10 - Nanotechnology
    39:10-42:00 – Sumerians and Annunaki’s
    42:00-48:40 – 10th Dimension
    48:40-50:20 – Ancient Aliens
    50:20-53:58 – First Monotheistic Religion
    53:58-56:46 – Reptilian Conspiracy Theory
    56:46-01:02:34 – Chronology of Humans
    01:02:34-01:04:32 – Book of Enoch
    01:04:32-01:09:44 – Block chain and NFT’s
    01:09:44-01:14:45 – Digital Flexing and crypto currency
    01:14:45-01:17:20 - Simulated reality
    01:17:20-01:29:08 – Neuralink
    01:29:08-01:34:44 – AI and its targeting
    01:34:44-01:56:22 – Our dark future
    01:56:22-01:57:13 – Ending Credits and outro

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  • Are We Alone in the Universe?

    22:06

    UNSW Physics Outreach investigates some of the biggest questions in physics.
    In this episode we asked six scientists (from various institutions) at the University of New South Wales about our search for life in the universe.

    Previous documentary What happened before the big bang?:

    Speakers:
    Prof. Paul Davies (Arizona State University):
    Dr. Jonti Horner (University of Southern Queensland):
    Dr. Lucyna Kedziora-Chudczer (UNSW Australia):
    Dr. Jonty Marshall (UNSW Australia):
    Dr. Vincent Smith (University of Bristol):
    Mr. Shane Hengst (UNSW Australia):

    Credits:
    Director, Camera & Editor: Don Kountouris
    Special Thanks:
    Footage Island, NASA ArtSpace & Beachfront B-Roll
    AA VFX
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  • Are we alone in the universe? - Neil deGrasse Tyson

    12:28

    Are humans so dumb that aliens have written us off? Celebrated astrophysicist Neil deGrasse Tyson seems to think that may be the case.

  • Are We The Only Intelligent Life in the Universe?? | Joe Rogan & Brian Cox

    7:42

    Taken from Joe Rogan Experience #1233 w/Brian Cox:

  • Are We Alone in the Universe?

    7:33

    Are we alone in the Universe? Do aliens exist also?

    In today's video we cover the possibility of alien life existing in the Universe, and what that might look like.

    If you have pests, alien or Earth-local, contact us at 855-WILDLIFE or and we'll be sure to help you out.

  • We’re not alone in the universe, ex-ESA director tells RT

    3:20

    In the wake of the 60th anniversary of Gagarin’s first-ever foray into outer space, RT speaks to the former director general of the European Space Agency, Johann-Dietrich ‘Jan’ Wörner, about how the landmark flight paved the way not only for Mars exploration, but extra-terrestrial pursuits.

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  • Are We Alone In The Universe? Documentary

    53:57

    Zecharia Sitchin
    Documentary based on Genesis Revisited, book by Zecharia Sitchin.

  • E.T. Life: What are the Odds? Are We Alone in the Universe?

    13:05

    Dr. Michael S. Heiser talks about whether or not we are alone in the universe. Are there reasons why we should believe E.T. life exists? Watch and find out. Learn more on this episode at the Fringe Pop 321 website:

  • The Fermi Paradox - Are we alone in the Universe?

    4:00

    The Fermi Paradox - Is there life in our Solar system?
    Is there life in our galaxy?
    Is there life anywhere else in the vast Universe??

    Given the the size of the Universe with an unimaginable amount of stars and solar systems....there has to be life out there somewhere....surely?



    Many of us have often thought......are we alone?
    Is there life in our Solar system?
    Is there life in our galaxy?
    Is there life anywhere else in the vast Universe??

    Given the the size of the Universe with an unimaginable amount of stars and solar systems....there has to be life out there somewhere....surely?

    In 1950 physicist Enrico Fermi asked this question amongst colleagues and quickly went to work on calculations on the probabilities of life existing elsewhere.

    Just in our own galaxy, the Milky Way...... which is thought to contain up to 400 billion stars.... Estimations suggest there are roughly 20 Billion stars composed just like that of our Sun.

    If just 1 in 5 has an earth like planet in orbit within the habitable zone, also known as the ‘Goldilocks zone” where it is not too hot or too cold, that would give us 4 Billion planets that could potentially support life....

    If just a mere 0.1% of these Earth analog planets do actually have life within them.... then this amounts to 4 million life dwelling homes.

    If just 0.1% of these planets contain ‘intelligent life’ comparable to humans....that gives us 40,000 civilisations

    And if just 0.1% of these civilisations we’re capable of space flight and like humans, are explorers who want to expand to other planets, then there will be 40 whizzing about in space around the Milky Way!

    And this is just from using low estimates.

    But the problem is.....we have ZERO evidence that these calculated probabilities are actually happening! And this is the basis of The Fermi Paradox.

    So where are they?

    There are many theories as to why we are yet to detect any other forms of intelligent life...and these include....

    We are the first to emerge with technology capable of transmitting and receiving communications across space and therefor it is currently impossible to make contact.

    Natural disasters such as super volcanos or large asteroid impacts are wiping out developing civilisations.

    Weather conditions and climates on other planets could be too unstable to sustain life long enough for sufficient evolution development.

    Their planet is poor on resources so may never have the ability to progress technologically.

    Other civilisations are choosing not to look outward.

    Maybe we are just not able to detect them through incompatible technologies, using methods and devices we have no understanding of.....or you could say....completely alien to us!

    Other civilisations that may have became capable of communication have already lived out their existence and no longer exist, possibly by destroying themselves through wars, or with much more powerful and advanced technology! But should we be able to see some form of evidence of previous existence in the cosmos?

    Maybe, just maybe we are a fluke, an anomaly, and are the only ones out there....anywhere!

    Or worse yet, we could have been created, physically or virtually, and are currently being observed by a super intelligent species hiding from us, just to see how we develop. We could potentially be some sort scientific experiment that could end anytime!

    It’s a scary thought.

    Whatever the truth actually is......we may never discover it.

    But that will not stop us from trying.

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  • WE ARE PROBABLY ALONE IN THE UNIVERSE SOME ETHICAL, PHILOSOPHICAL AND RELIGIOUS ISSUES

    20:30

    Howard Smith - SEARCH FOR LIFE: FROM EARLY EARTH TO EXOPLANETS - XII TH RENCONTRES DU VIETNAM - QUY NHON DECEMBER, 2016


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  • ANCIENT ASTRONAUTS: Are We Alone In the Universe? Comercial FREE Movir Rental

    55:29

    SEE WHAT’S NEW at UFOTV ALL ACCESS - COMMERCIAL FREE WITH YOUR SUPPORT - NOW ON ALL SMART TVs, COMPUTERS and PERSONAL DEVICES - SUBSCRIBE NOW - STREAM BIG!

  • The eerie silence: Are we alone in the Universe?

    1:6:59

    Professor Paul Davies gives this public lecture entitled: The eerie silence: Are we alone in the Universe? on Friday, 18 May 2012 at The Australian National University.

    Paul Davies is a theoretical physicist, cosmologist, astrobiologist and best-selling author. He is Regents' Professor at Arizona State University, where he directs the Beyond Center for Fundamental Concepts in Science -- a cosmic think tank that tackles the big questions of existence, from the origin of the universe to the origin of life and the nature of time.

    Davies also directs a National Cancer Institute research program that tackles cancer from a physics perspective. Among his research accomplishments, Davies helped explain how black holes radiate energy, what caused the ripples in the cosmic afterglow of the big bang, and why life on Earth may have come from Mars.

    Davies has written about 30 books, most recently The Eerie Silence: Are We Alone in the Universe? His preoccupation with deep conceptual problems and his fearless championing of bold new ideas earned Davies the epithet of 'The Disruptor' in a recent profile in Nature magazine.

    His many media projects include presenting two six-part series on The Big Questions for Australian television. He has awards from The Royal Society and the UK Institute of Physics, and also received the 1995 Templeton Prize. In 2007 he was named a Member of the Order of Australia in the Queen's birthday honours list.

  • Are we alone in the universe? | Lisa Feldman Barrett and Lex Fridman

    1:51

    Lex Fridman Podcast full episode:
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  • Are We Alone In The Universe? | The Big Question | Earth Lab

    5:01

    We can see black holes but we still haven't found extraterrestrial life in space. Does this mean there is no such things as aliens? BBC LGBT correspondent Ben Hunte looks at whether aliens exist, and where they could be hiding.

    Subscribe to Earth Lab:
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    The Doctors Are In The House:


    Welcome to BBC Earth Lab! Here we answer all your curious questions about science in the world around you (and further afield too). If there’s a question you have that we haven’t yet answered let us know in the comments on any of our videos and it could be answered by one of our Earth Lab experts.

  • The Science of Ad Astra - Alone in the Universe for a Loner

    16:46

    The Science of Ad Astra - Alone in the Universe ?
    Audio Commentary by James Gray

    AD ASTRA - Directed by James Gray

    I'm focused here on Science but there are lot of thematics in Ad Astras Audio Commentary like Masculanity, Artistic Liberty, Genesis of the film etc...

    Extra Footage used:
    Mars Curiosity Descent:
    Action Cam Footage From October 2017 Spacewalk:
    Earthrise: The Story of the Photo that Changed the World | Short Film Showcase:
    Apollo 11 Earth Views and Crew Activities (1969):
    Apollo 11 Press Conference:

    Music used:
    Ad Astra - Max Richter - Cosmic Drone Gateway
    Ad Astra - Max Richter - The Rings of Saturn
    Ad Astra - Max Richter - A Trip to the Moon
    Ad Astra - Max Richter - Terra Incognita
    Ad Astra - Lorne Bafle - Briefing
    Ad Astra - Lorne Bafle - Opening
    Ignis: IV. - Jon Opstad

    Chapter:
    0:00 Fox/Disney movie ?
    0:30 Science Fiction films
    2:20 Mother Earth
    3:48 Destination Moon
    4:39 the Future
    5:15 Moon war ?
    5:56 Plausible vision
    6:53 Mars exploration
    8:12 Astronauts psychology
    10:03 the perfect Astronaut, a loner ?
    12:05 Human in deep space, agony ?
    14:40 the Myth of the Hero
    15:40 Alone in the Universe for a Loner


    All Rights Reserved to their Own Owners.
    Edited by Steven Thomas, 2020.

  • Steven Universe | Alone At Sea | Cartoon Network

    4:01

    Jasper returns for Lapis and is desperate to fuse!
    Subscribe to the Cartoon Network UK YouTube channel:


    Visit the Cartoon Network UK website:


    Welcome to the official Cartoon Network UK YouTube channel, the place where you can watch funny videos, clips with theme tunes and songs and interactive game plays from The Powerpuff Girls, Adventure Time, The Amazing World of Gumball, Regular Show, Ben 10, We Bare Bears, Uncle Grandpa, Steven Universe, Clarence, Teen Titans Go!, Ninjago and many more. Get ready to laugh out loud and join us by subscribing to the channel!

  • David Usher - Alone in the universe

    3:56

  • Neil deGrasse Tyson on Aliens and How the Universe Will End | Amanpour and Company

    18:03

    Why is the universe the way it is? How did life begin? And how might it end? Our next guest has spent his life in search of the answers. Neil deGrasse Tyson is an astrophysicist, author and popular science communicator. His new book, Cosmic Queries, was co-authored with physicist James Trefil. Tyson joins our Walter Isaacson to discuss the book and what drives his thirst to explore the really big questions of the universe.

    Originally aired on March 23, 2021.

    ---------------------------------------------------------------------------------------------------------------------------

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    Watch Amanpour and Company weekdays on PBS (check local listings).

    Amanpour and Company features wide-ranging, in-depth conversations with global thought leaders and cultural influencers on the issues and trends impacting the world each day, from politics, business and technology to arts, science and sports. Christiane Amanpour leads the conversation on global and domestic news from London with contributions by prominent journalists Walter Isaacson, Michel Martin, Alicia Menendez and Hari Sreenivasan from the Tisch WNET Studios at Lincoln Center in New York City.

    #amanpourpbs

  • We are NOT alone in the universe, I found proof on the Dark Web Creepypasta | Scary Stories

    11:13

    This creepypasta scary story is from the Nosleep subreddit

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    #scarystories #creepypasta #nosleep

  • Are We Alone In The Universe? | E01 | Full Episode | Steps To The Future

    52:00

    See an in-depth discussion on the viability of living species in our universe.
    Subscribe For More Documentaries ????
    **This film is under license from Vision Films Inc. All rights reserved**

    #Documentary #Channel #Facts

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