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  • 7 Unique Places Even Scientists Cant Explain


    Exploring outer space is awesome, but what if there are places right here on Earth that are just as incredible and jaw-dropping? Luckily for you, you live on Planet Earth, a place that holds secrets so wild and baffling that even scientists can’t always explain them!

    Have you ever heard about the Boiling River in the Amazon or never-ending light storm? Can you believe that there’s a place on Earth with its own ecosystem and atmosphere, similar to another planet? Maybe you wanna see dancing lights in the sky? Well, the residents of Hessdalen Valley, Norway, can enjoy them every night! The world is full of amazing things, so prepare to be amazed as you learn about 7 of the most unbelievable mysteries and phenomena.

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    The Devil’s Kettle Waterfall 0:41
    Stonehenge 1:53
    The Hessdalen Lights 3:17
    The Boiling River in the Amazon 4:23
    Movile Cave 6:09
    Circles of Namibia 7:30
    Western Venezuela’s Never-Ending Light Storm 8:28

    #funsciense #amazingplaces #mysteriousplaces

    Music by Epidemic Sound

    - What’s interesting about this waterfall is that it has 2 different bodies of falling water. One side has water falling into another body of water, Lake Superior; the other one has water that falls straight into a huge natural hole in the ground. Where does this water lead? No one seems to know!
    - While today we have machines that can help us lift heavy materials to build giant buildings and monuments, back in the days when Stonehenge was built, no one had access to this type of technology.
    - In Hessdalen Valley, brightly colored lights appear in the sky in different colors and shapes. For the last 4 decades (and possibly longer!), this phenomenon has continued to puzzle scientists.
    - Deep in the Amazon rainforests lies a flowing river in the forested region of Mayantuyacu that boasts temperatures so hot that any person or animal that falls into it literally boils alive from the inside out.
    - Movile Cave, located in Southeastern Romania, remained closed in complete darkness for a whopping 5.5 million years! Scientists carved out an opening to the cave and found that a completely sustained ecosystem was thriving inside!
    - Circles of Namibia are almost perfect and range anywhere from 10 to 65 ft in diameter. Many scientists have offered up theories as to why these circles appear instead of other more random shapes.
    - But in Western Venezuela, over the mouth of the Catatumbo River, there’s a lightning storm that seems to be running on Energizer batteries — it just keeps going and going! Once the clock strikes 7 PM, the lightning storm begins and doesn’t relent for another 10 long hours.

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  • EPicks: Normobaric hypoxia and environmental limits for thermal balance during exercise-heat stress.


    In this video, Geoff Coombs discusses his latest paper discussing how normobaric hypoxia does not alter the critical environmental limits for thermal balance during exercise-heat stress.

    Read more in Experimental Physiology
    Normobaric hypoxia does not alter the critical environmental limits for thermal balance during exercise-heat stress.

    Geoff Coombs, Matthew Cramer, Nicholas Ravanelli, Pascal Imbeault, Ollie Jay

    104(1), pp 359-369


    Hi, my name is Geoff Coombs and I’m currently a post-doc at Western University in Canada.

    I’ll be discussing a recent article published in Experimental Physiology that was done during my postgraduate studies at the University of Ottawa.

    This work was supervised by Dr. Ollie Jay from the Thermal Ergonomics Laboratory at the University of Sydney.

    We tested whether acute hypoxia sufficiently influences thermoregulatory responses to change maximal heat loss during exercise in warm, humid conditions.

    To do so, we recruited eight participants to cycle at a fixed rate of metabolic heat production of 500 watts for 90 minutes in 34°C, 40% relative humidity.

    After steady-state conditions were reached at 45 minutes, we incrementally increased ambient humidity by 3% every 7.5 minutes.

    This protocol was done in normoxia and repeated on a separate day in normobaric hypoxia with an inspired fraction of oxygen of 0.13.

    We continuously measured rectal and esophageal temperatures, local sweat rates and skin blood flow in several locations, as well as whole-body sweat losses.

    A change in the critical ambient vapour pressure at which esophageal temperature inflected upward indicated a difference in maximal heat loss.

    Despite higher skin blood flow as a percentage of maximum, sweating, core temperatures, and the critical ambient vapour pressure were all not different between conditions.

    Therefore, hypoxia does not alter maximal heat dissipation during exercise in humans. These implications of these results could be important for competition in the heat at high altitude, and also for cross acclimation studies combining both hypoxia and heat.

    However, these findings should be replicated in other groups such as females and older adults. Thanks for taking the time to learn more about our study.



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