What If Humans Were Cold-blooded Creatures? | Unveiled


What if Humans Were Cold-Blooded Creatures? Humans can live almost anywhere on the planet. We’re capable of adapting to the harsh conditions
of the arctic circle, the high altitudes atop the Andes, and even in the midst of tropical
jungles. In fact, few species are spread as far and
wide as humankind, with us even aiming to venture to the stars and colonise alien worlds. But could evolution have taken us down a totally
different path? This is Unveiled, and today we’re answering
the extraordinary question; What if humans were cold-blooded creatures? Are you a fiend for facts? Are you constantly curious? Then why not subscribe to Unveiled for more
clips like this one? And ring the bell for more fascinating content! First off, what do we actually mean by “warm”
and “cold-blooded”? Neither are the best nor most specific of
terms. Biologists would rather speak of “endothermic”
and “ectothermic” creatures, referring to animals that either produce their own body
heat, or don’t. As well as that, we have “homeothermic”
or “poikilothermic” creatures, meaning an animal either maintains its own internal
body temperature, or it relies on its environment to regulate it. All told, as humans, we’re endothermic homeotherms,
because we produce our own body heat and maintain it ourselves, through our metabolism. Most other mammals and birds also do this,
but cold-blooded animals – or “ectothermic poikilotherms” – are incapable of regulating
their own temperature. That’s why you see lizards in the desert
bathing in the baking sunlight, because they need to warm up their bodies before their
muscles and brains can work. Interestingly, though, even these aren’t
the only options that the natural world can throw up. Palaeontologists now believe that some dinosaurs
were actually “mesothermic”, meaning that they survived via a combination of creating
and maintaining their own body heat and utilising their environment. But for this video, let’s just focus on
the basic, non-dino categories. If humans had evolved to be cold-blooded instead
of warm-blooded, or even if we all miraculously turned cold-blooded overnight, one of the
first big changes we’d all notice is we’d be eating less food. A lot less food. Even the so-called ‘king of reptiles’,
the crocodile, can actually go more than twelve months without eating anything at all. They’re painted as ruthless killers of the
deep, but typical crocs only average about fifty meals a year – or just one a week. If humans ate so infrequently – rather than
tucking into three square meals a day plus snacks – our food bills would definitely
be much cheaper, it’d also be much easier to feed everybody around the world, and we’d
only need a tiny fraction of the land we use now for agriculture. Theoretically, nobody would ever have to go
hungry. Of course, you still could eat three meals
a day, if you wanted to. But, with the much slower metabolism of a
cold-blooded creature, the calories wouldn’t have anywhere to go, and the added food would
translate into fat. In lots of warm-blooded animals, fat is pretty
important and essential – keeping mammals like seals and whales warm in freezing oceans,
for example. But it could prove deadly very quickly were
we cold-blooded, causing us to overheat and die. Luckily, as a cold-blooded being, you should
never feel hungry enough for this to ever actually happen… but over-indulgence would
definitely be off the menu. Assuming that you don’t eat too much, though,
it’d actually be harder to get sick as a cold-blooded animal. The constant heat of an endothermic homeotherm
(as we currently are) provides a perfect incubator for germs, which is why it’s so easy for
us to get sick from just being near other sick people. But, if we were cold-blooded, our bodies wouldn’t
be able to cultivate these germs as easily, staving off potential infections. There is a deadly caveat, though, because
our new-found cold-bloodedness wouldn’t make it impossible to get sick; and if you
did fall ill, the consequences could be dire. You may not spread your disease, but if you
got just a little too cold – say your heating breaks, or the wind picks up when you’re
waiting for a bus – your lowered body temperature could damage your immune system. If an ectotherm is too cold for too long,
their body could stop functioning, leaving them wholly unable to fight off disease and
infection. As warm-blooded creatures, we can live anywhere
with relative ease, usually by just adding or removing layers of clothing. We can even survive the likes of Antarctica
with the right equipment. But, if we were cold-blooded, the state of
our environment becomes a matter of life or death every single day. Where most warm-blooded creatures maintain
a body temperature of around 37 degrees Celsius, a cold-blooded creature is exactly the same
temperature as its environment. So, if humans were suddenly cold-blooded,
we’d be much better off living in jungles and deserts, along the equator and in the
tropics, never straying too far north or south. If we did branch out to a colder region we’d
need to build complex habitats, designed to maintain a constant, reliable, 24/7 temperature. Going outside for just a couple of minutes
could result in death, so human settlements would have to be high-tech places – with
our fundamental need for tolerable temperatures at their heart. Strangely, though travelling to places like
Canada, Russia or Scandinavia would be a lot harder, travelling into space might actually
be easier if we were a species of advanced ectotherms. This is because it’d theoretically be easier
to go into torpor if we were ectothermic, which is a state of total inactivity some
animals can enter by slowing their metabolism to a stop. Putting humans into deep sleep is a staple
sci-fi idea, but it’d be all the easier if we could just do this naturally, without
the need for complex technologies that we haven’t yet invented. Send some deep space astronauts on a shuttle
to Mars and (if they’re cold-blooded) they could nap through the whole journey, meaning
they needn’t take as much food and water with them, and they needn’t deal with the
loneliness. Though, of course, actually living on Mars
would be just as tricky for any ectotherm, since the Red Planet’s average surface temperature
is minus-60 degrees Celsius. There’s one final thing that’s pretty
important, though: brain function. The human brain uses about 20% of our current
energy levels, which is 20% of our daily caloric intake. Clearly, if we only ate one meal a week, our
human brains wouldn’t receive the same power to reach the same levels… It’s why the world isn’t really run by
a race of advanced lizard people. If there actually were lizard people, they’d
be evolutionarily obliged to spend most of their days sunbathing just to get their brains
and bodies to work – and they’d have to stay stuck on the equator, to even begin to
match the potential of a warm-blooded rival. So, even with space travel, the problems would
again outweigh the plus points. Yes, we might stand more of a chance of actually
getting to other planets, but would a cold-blooded crew be clever enough to work out what to
do next? Probably not. With this in mind, if humans had always been
cold-blooded, evolution wouldn’t have happened in even remotely the same way. We certainly wouldn’t be such a social species,
and our hunter/gatherer instincts wouldn’t have developed as they did. Instead, we’d all have sat around waiting
for our next meal to arrive, expending all of our limited energy on trying to catch it
in one strike – just like real-world reptiles do. It’s why you see crocodiles floating ominously
in the water for hours on end, biding their time, for absolute efficiency. Even if we did have some intelligence, we
wouldn’t have needed to co-operate to do things like build, farm, and generally invent. The only time we’d ever really need to have
met other people would’ve been for procreation. And, even then, reptiles and fish aren’t
exactly known for their parental instincts, instead tending to leave their offspring to
fend for themselves, or else ditch them before they’ve even hatched. And, as well as all of that, we probably wouldn’t
even be bipedal. Instead, we’d crawl around, spreading our
bodies to expose as much of our skin to the sun as possible, in order to increase our
brain function. True, nobody would ever go hungry because
of our extremely low metabolisms. But, we also probably wouldn’t care if anybody
went hungry in the first place, because an ectothermic race of humans would essentially
all be lazy, antisocial lizards. And, that’s what would happen if humans
were cold-blooded creatures. What do you think? Is there anything we missed? Let us know in the comments, check out these
other clips from Unveiled, and make sure you subscribe and ring the bell for our latest
content.

100 Comments

  1. Unveiled said:

    Check out the next Unveiled video, and let us know what you think! What If Pregnancy Was Really Rare? https://www.youtube.com/watch?v=EwYPkQqlMsk

    June 1, 2019
    Reply
  2. Gorilla_Go_Stupid said:

    First guy in the thumbnail looks like terry crus

    June 3, 2019
    Reply
  3. Nunyo Bisnus said:

    Canada niggas

    June 3, 2019
    Reply
  4. Ashton Wilson said:

    only cold blooded human is hillary

    June 3, 2019
    Reply
  5. Genocoly said:

    Reminds me of my ex

    June 3, 2019
    Reply
  6. Bob Ross said:

    Some humans are cold blooded

    June 3, 2019
    Reply
  7. mike odnoralov said:

    Why he gettin lizard people on this

    June 3, 2019
    Reply
  8. mike odnoralov said:

    Sketchyyyyy

    June 3, 2019
    Reply
  9. SabisBad said:

    so if we go cold blooded then we basically need to live in the desert and stay in the sun naked while eating cactus once a week??? AND it would be almost impossible to transport stuff from the north to the south if the temperature is cold? and winter would basically be a death zone so we need to migrate if we don’t live near a desert? but what about the night in a desert? WTF

    June 3, 2019
    Reply
  10. Lima’s Bean hut said:

    I jacked off to this

    June 3, 2019
    Reply
  11. Martin Q2000 said:

    "What if humans were cold blooded"
    *Mark Zuckerberg sips water violently*

    June 3, 2019
    Reply
  12. skull games said:

    sees titel we would not have a soul

    June 3, 2019
    Reply
  13. Val- Vals said:

    I think some of us are already cold blooded. Lazy antisocial lizards = half of my school

    June 3, 2019
    Reply
  14. Marie Lambert said:

    You sound like the guy from NileRed

    June 3, 2019
    Reply
  15. 〈Chopper Gamer〉 said:

    We do have those, they're called politicians

    June 3, 2019
    Reply
  16. PrimitiveJL said:

    Cough Cough Mark Zuckerberg…

    June 3, 2019
    Reply
  17. Iqbal Nur Muhammad said:

    Human form a new classification,
    ZUCKERMAN.

    June 3, 2019
    Reply
  18. Neat said:

    Conclusion: it's better to be warm blooded

    June 3, 2019
    Reply
  19. Xtraior 37 said:

    All reptilians laughing in the comments rn

    June 3, 2019
    Reply
  20. JAYA KUMAR V said:

    Aren't humans cold blooded already

    June 3, 2019
    Reply
  21. Look at my nosehole said:

    We already are

    June 3, 2019
    Reply
  22. Zeime said:

    Ask Zuck

    June 3, 2019
    Reply
  23. Ned Pene said:

    But Damian Lillard already exists?

    June 3, 2019
    Reply
  24. Anesti Kolici said:

    Nobody:

    Unveiled: WhAt If HuMaNs WeRe CoLd-BlOoDeD CrEaTuReS?

    June 3, 2019
    Reply
  25. R-Ray Nhish said:

    That moment when u dont understand cause u use Fahrenheit

    June 3, 2019
    Reply
  26. King Armish said:

    Ask Mark Zuckerberg, how it feels to be cold blooded 😂

    June 3, 2019
    Reply
  27. * said:

    Who the fuck sleeps at 30 C?

    June 3, 2019
    Reply
  28. Lasse Joensen Schmidt said:

    The video litteraly start of with a voicecrack

    June 3, 2019
    Reply
  29. Shannon Morgan said:

    Well apparently you haven't run into Rico Johnson from the west side of Chicago, that dude is cold blooded for sure.

    June 3, 2019
    Reply
  30. Michael said:

    Cold Blooded Human Government: "Should we try and put this bill through the congress?"
    Congress: asleep because they're hibernating

    June 3, 2019
    Reply
  31. GhanBuri666 said:

    It's good to be Reptilian if you live deep under the ground 🙂

    June 3, 2019
    Reply
  32. rest fede said:

    1st dude is Tyler1

    June 3, 2019
    Reply
  33. Dae Dae said:

    I was the 19000 like 😊😊

    June 3, 2019
    Reply
  34. Dae Dae said:

    Lmao that was mad gay

    June 3, 2019
    Reply
  35. KickAHobo said:

    This video needs more stock footage.

    June 3, 2019
    Reply
  36. Jan Johnson said:

    You've never mit my exdaughterinlaw!

    June 3, 2019
    Reply
  37. Crazy HGamer said:

    I thought you meant cruel creatures

    June 4, 2019
    Reply
  38. Don't drink the water said:

    That youtube profile pic
    The video image
    A dark blue colour

    THE COMBINE ARE HERE AMONG US

    June 4, 2019
    Reply
  39. The Banana Man said:

    Is Orochimaru cold blooded?

    June 4, 2019
    Reply
  40. Ahmed Is King said:

    Good to know

    June 4, 2019
    Reply
  41. Colonel N. said:

    Humans are already cold blooded

    June 4, 2019
    Reply
  42. Ok Pant On said:

    What if humans were cold blooded you say better yet ask those anti-vax parents.

    June 4, 2019
    Reply
  43. Ralph Saavedra said:

    Aren't we already?

    June 4, 2019
    Reply
  44. Lily'sDong said:

    Is this video trying to ease us about Lizard people actually being real and have been living with us the whole time?

    June 4, 2019
    Reply
  45. CivicJaguar 22 said:

    Mother: Son, you have been playing that video game for too long, go out and get some sunlight.
    Son: I know what I want to do, mom!
    A few minutes/hours later
    Son: I feel cold I need heat..

    June 4, 2019
    Reply
  46. DirtCity Roller Rats said:

    God made people

    June 4, 2019
    Reply
  47. Ivan Abednego said:

    What if ocean man exist ?

    June 4, 2019
    Reply
  48. Ivan Abednego said:

    Then the song would be "MANS NOT COLD"

    June 4, 2019
    Reply
  49. Yami Sukehiro said:

    Who said we aren't cold-blooded?

    June 4, 2019
    Reply
  50. 1000 subscribers without videos said:

    Most already are.

    June 5, 2019
    Reply
  51. Abel Gomez said:

    Lazy anti social creatures- ha many humans already like that thanks to internet

    June 5, 2019
    Reply
  52. Duc Minh Tran said:

    I bet 95% this video was inspired by the movie "Cold Skin" (2017)

    June 5, 2019
    Reply
  53. lonely phony said:

    I think I’m cold blooded. I don’t really need to eat after like 8 – 12 hours. I’m barely hungry. I guess it My Asian Parents fault.

    June 5, 2019
    Reply
  54. Dionysios L. said:

    7:38 Bold of you to assume I'm not already lazy and antisocial.

    June 6, 2019
    Reply
  55. Nima Senpai said:

    We'd be Argonians but we couldn't live in Skyrim

    June 7, 2019
    Reply
  56. Leticia Garcia said:

    Im lazy and anti social
    IM A REPTILIAN!

    June 7, 2019
    Reply
  57. Binozia - Tech said:

    people always call me a snake…

    June 16, 2019
    Reply
  58. Forbidden Chicken said:

    What if we made Africans cold blooded? No more hunger(they need less amount of food), plus Africa is hot, but we don't want the genes to be passed elsewhere or the person will die because the place it has been passed to will be different than Africa, that would separate humans from other humans because they need certain conditions, which would include racism, some people would not want those genes in there children or are suspicious about it or people of that race who has it. So no, looks like world hunger will stay a thing.

    June 16, 2019
    Reply
  59. RichBlueBlox said:

    No one:

    Unveiled: “What if humans were cold-blooded creatures,”

    Mark Zuckerberg: Takes sip of water

    June 17, 2019
    Reply
  60. Icynarc said:

    Their are cold blooded humans out there though

    June 18, 2019
    Reply
  61. AlexWess said:

    well,my girlfriend is colder with me than the climate in Siberia

    June 18, 2019
    Reply
  62. Caleb Jordan said:

    What would we look like if we were coldblooded? Like reptiles?

    June 18, 2019
    Reply
  63. edilberto soguilon said:

    Honestly…i like me to be coldblooded…imagine…never have to do anything…no more work problems…no more social problems…no more of this and that problems…yeeey…always on the beach…getting tanned…

    June 18, 2019
    Reply
  64. BRIT .303 said:

    Some of us are….. they call them feminists

    June 19, 2019
    Reply
  65. Theatre Kid Bri said:

    If I’m warm blooded…then why am I always cold?

    June 19, 2019
    Reply
  66. Pls Help Me I'm In Great Pain said:

    So you're telling me humans aren't cold-blooded creatures?

    June 19, 2019
    Reply
  67. Jude Ivan Bernardino said:

    Why am I watching this video when I just need to look at my crush to know what a cold blooded human creature is like

    June 19, 2019
    Reply
  68. Moi Hoi said:

    We kind of are…

    June 19, 2019
    Reply
  69. Toucan SonofSam said:

    Humans are coldblooded

    June 19, 2019
    Reply
  70. ALI FULLER said:

    YOU ASS HOLE WHEN WE KILL SOMEBODY THAT COLD BLOOD HAVING NO REMOTES FOR A ANOTHER HUMAN LIFE .😑

    June 19, 2019
    Reply
  71. Corvo Attano said:

    Yare Yare Daze.

    June 20, 2019
    Reply
  72. JeminantTheCreature said:

    Ectotherm Poikilotherm/Cold Blooded Creatures
    Lizards 🦎
    Frogs 🐸
    Crocodiles 🐊
    Snakes 🐍
    Tarantulas 🕷
    Fish 🐠
    Turtles 🐢
    Scorpions 🦂
    Snails 🐌

    June 20, 2019
    Reply
  73. Mrfuel Chamo said:

    What if u r reptalian u yes u

    June 20, 2019
    Reply
  74. Kami Easton said:

    We can adapt to any environment on the planet.

    Ebola:
    Hold my genome and watch me ruin this mans entire career.

    June 21, 2019
    Reply
  75. suscribe for no reason said:

    Hmm I always knew I was hot

    June 21, 2019
    Reply
  76. Chi Pa Pa said:

    Would humans look like frieza if they were cold blooded?

    June 23, 2019
    Reply
  77. Noah E said:

    Wait…I'm a black 9 yr kid named Noah

    June 23, 2019
    Reply
  78. Thomas Ford said:

    "Lazy endothermic lizards". I have to use that as an insult at some point.

    June 23, 2019
    Reply
  79. andres canseco orozco said:

    Actually we are cold already.

    June 24, 2019
    Reply
  80. Zerbos said:

    Wait we’re warm-blooded?

    June 24, 2019
    Reply
  81. Arcane iconoclast said:

    Jeffrey Dhamer was cold blooded.

    July 6, 2019
    Reply
  82. Ken Hayabusa said:

    Some humans are lazy and antisocial. 🙂

    July 7, 2019
    Reply
  83. Ivanhoe ॐ said:

    thats why lizard people live underground. temperatures are a lot higher and they have their sun warming them up.

    July 9, 2019
    Reply
  84. Andrew Tejada said:

    What is this “if”???

    July 10, 2019
    Reply
  85. Benedict Lozada said:

    What if male were warm blooded and female were cold blooded?

    July 12, 2019
    Reply
  86. winglessang31 said:

    Aha! That’s why I’m lazy and anti social! I’m a reptile. It all makes sense now. I should be cutting the grass but I’m laying down and avoiding talking.

    July 14, 2019
    Reply
  87. I would fuck that said:

    we already have coldblooded human – their called lawyers

    July 24, 2019
    Reply
  88. Tasso Demo said:

    If humans were cold blooded almost every youtuber would survive, since most of them live in LA

    July 24, 2019
    Reply
  89. Erick Maués said:

    Some are.

    July 28, 2019
    Reply
  90. Rusty Riot said:

    There is one. I think his name is Mark Zuckerberg.

    August 10, 2019
    Reply
  91. ilias Gravity said:

    What if meteors

    August 22, 2019
    Reply
  92. Zee said:

    2:11 my classmates .

    September 5, 2019
    Reply
  93. Warp Drive said:

    Are humans cold blooded creatues? Study history my friend.

    September 14, 2019
    Reply
  94. lucario monster said:

    What if reptiles were warm blooded creatures

    September 14, 2019
    Reply
  95. Paola Cajares Living in PA Review said:

    https://youtu.be/GWxxtTSFch0 am a junky when it comes to physics. We could do space traveling better.

    November 6, 2019
    Reply
  96. Manpreet Singh said:

    You just sweat a lot and more muscle weight than any fat actually and you wear less clothes in summer and winter

    November 22, 2019
    Reply
  97. Lemonade said:

    We'd have higher electric bills.

    November 22, 2019
    Reply
  98. Slađana Matić said:

    WE WOULD LOOK LIKE THE LIZARDMAN FROM THE AMAZING SPIDER MAN 2012

    November 25, 2019
    Reply
  99. Eisdax said:

    00:07 Sounds like he's talking about a really nasty disease (which is accurate).

    November 26, 2019
    Reply
  100. Torper Vazquez said:

    Sea lamprey will ruin human life

    November 28, 2019
    Reply

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