Don’t Believe These 6 Science Facts

Don’t Believe These 6 Science Facts


Are some of the science facts you’ve been
believing actually science fiction? Let’s talk about that. ♪ (theme music) ♪ – Good Mythical Morning!
– We live in a world full of – misinformation. And today we’re gonna
– Mm, mm. – clear up a little bit of that.
– Hm. There are these things that you’ve heard —
you’ve probably believed at least some of these — that are scientific “facts” that
actually are not “true.” – Factoids?
– True doesn’t even need quotes. – They’re just not true. Right.
– They’re “fasly.” But they’re the kind of things you’ve
probably heard somebody say in the past. Everything that I’m going through
today is something that somebody has believed to be true in the past. But,
Link, it’s a game. I’m gonna be going – through 10 of those.
– This is a what? – This is a…
– (both in a deep voice) Game! – (laughing) Whoa, that was… good.
– Dramatic. You have to get 7 out of 10 in order to
win a very special tray of science. ♪ (“UFO” sounds) ♪ Which obviously you just took off of the
coffee table in our lounge. Yes, and if you win, you can put it
all back. – I would like to do that. If I lose, what?
– Sorry, I just didn’t think fast enough, and that’s what I came up with. Okay,
if you lose, I’ll just put that back on – the conference table.
– (crew offscreen laughing) Are you ready to play, “Hey, Link.
Is That Factoid You’ve Been Believing All Your Life Actually Science Fiction?” Yes, I’m ready to play that. And I do
wanna win, ’cause I wanna put the stuff – back where I wanna put it.
– Okay, science fact or science fiction, Link. House flies only have a lifespan of
about 24 hours. – Hm.
– Hahaha. That’s one day. – I’ve heard this. Which means nothing.
– Oh, yeah. – Just because I’ve…
– You’ve probably heard all of these. – Okay, that’s kind of the point, right?
– Mhm. So either it is true, or it’s false and we
just thought it was true. – (clicking tongue)
– I get it. Yeah, you understand the rules. Thank you
for establishing that. – You know, that just seems…
– This is a… – (both in a deep voice) Game!
– Yeah. Um, this is a short lifespan for a fly.
Uh… I’m gonna say no. That’s too limiting
for a fly. They deserve more, and I hope – they have it. Yes.
– You’re right, Link! It’s false! – (correct ding)
– Mature house flys can live for 15 to 25 days, depending on the conditions. And you
know how sometimes when a fly gets trapped in your house, and then it starts
getting fatter and slower? – Oh, yeah!
– What is up with that? And that was more than 24 hours, so I
should’ve know that. And then it’s easy to slap ’em at that
point. They just invite you to come up – and slam ’em against…
– I just open my mouth and I’m like, – (inhales deeply) And I just inhale ’em.
– You know what I’m talking about? The big– Ooh, don’t do that. I get ’em
with chopsticks. Mr. Miyagi, thank you. – (clicking tongue)
– Earth’s center is composed of liquid – hot magma.
– Uh… – True. This is true. (laughing) It is?
– Yeah. – No, it’s not! (laughing)
– (incorrect buzzer) – You’ve been believing a lie!
– What’s in the middle, marbles? Actually, the center of the earth is —
(laughing) marbles. Yes, marbles. – Next question.
– It’s actually a solid ball of iron. – Really? (laughing)
– I’ve been there. It’s real hot. – How big is the ball? As big as this?
– It’s as least as big as the microphone. It’s surrounded by magma, but right in
the middle is a ball of iron. A marble, – if you will.
– So I was right. Afterward. Cold weather makes you more susceptible
to sickness. – (laughing)
– Okay, um… It is true that you get more colds in
cold weather. That’s why the call it – a cold. But the, uh…
Oh, really? correlation to the temperature is
suspect at best. – Oh.
– I think I know this one, and it’s false. – You’re wrong, Link. (laughing)
– (incorrect buzzer) – It’s true! They thought that for a long
– (laughing) time, that it was just the cold weather
brought people inside, which trapped – with air that was dirtier.
– Yeah, yeah, yeah. But actually, Yale discovered… Yale – The whole college.
– It’s a university. Scientists at Yale discovered that cold
weather does intact make you more susceptible to sickness because the cold
air actually weakens your nose’s ability to keep germs out. And then the cold
lowers your immune system’s ability to deal with the germs once they get in.
Double whammy. Cold’s bad for Grammy. – Mm. And that’s how I’m gonna remember it.
– Yeah. – You’ve missed two out of three.
– I’m behind. Bats are blind and rely on echo location
to “see.” Well, hold on now. You can’t be like…
quotation stuff. – Like, what do you mean by “see?”
– I don’t know. Is that what this is? The trick part is
in the quotation? What I mean is that if you’re using echo
location to see, you’re not actually using your eyes to see. So instead of seeing
with their eyes, they use echo location. That’s why “see” is in quotes. It’s not
to throw you off. I’m getting nervous now, ’cause I just
don’t wanna look stupid. – (laughing) A lot of people believe
– On my own show. – these things though. Yeah, you have.
– I’ve been there before. And uh… I’d like to move counties. To like, “Oh, he’s a little smarter than
I thought…. – …not stupider than I thought.”
– You wanna move to Johnston county? – Or Wake County?
– I don’t know, man. You’re wigging me out with this, but
I’m gonna say true. – Yeah, they don’t see with their eyes.
– False. (incorrect buzzer) – False, man!
– They don’t see with their eyes! – Bats can actually —
– They can see something, but they… – …don’t fly…
– Some large bats can actually see three times better than humans. They
use their echo location for hunting prey. But they see with their eyes. Echo
location is just for a couple of meters out to zero in on insects and stuff,
but they can actually see. – Wow.
– “Blind as a bat” is a euphemism that is – wrong. Based on wrongness.
– Dang, did you know that? No, I did not know that. I mean, I knew
it when I this up, but… Okay, good. Good. That makes me feel
a little better. I think they get easier. – Press on. All right.
– For your sake, I hope. Eating too many carrots will turn you
orange. – Ooh, I’ve heard this.
– Science fact, or science fiction. I’ve been afraid of this one.
I love carrots. But I don’t like to look like I’m
spray tanned. Um… There’s no way. True. It’s true.
It is true. – You’re right, Link! It’s true!
– (correct ding) – Because of the beta carotene in them.
– Yes. All right. Actually turns your skin orange. In World
War II, the pilots were given carrots so – they could see better, and they…
– And they turned orange. – …developed an orange tone.
– And they didn’t have to wear – jumpsuits anymore. They were naked.
– Nekkid orange men. That last part’s not true. Your tastebuds
are constantly dying and regenerating. Is this a science fact or a science
fiction? Um, that is science fact. – Link, you’re on a roll!
– Yes. (correct ding) That’s right. Between every ten days
and two weeks. Because your tongue is sluffing skin off
like the rest of your body. The tastebuds change. And that’s one of
the reasons that your tastebuds change… – Over time!
– …as you age. It’s been shown that women who are going through menopause cannot
taste bitterness. I’m sure there’s a bitterness and menopause joke in there
somewhere, but I’m not gonna touch it. – I’m not gonna say anything about that.
– I can relate to that. You can imagine what that joke would be.
(inhales) – Okay. Ugh.
– Link, humans have five senses. Humans have five senses. Is this a
science fact or science fiction? Um… Well, the sixth sense. – And they made a whole movie about it.
– There’s a whole movie. – Um…
– He sees dead people. At the risk of seeming stupid, I’m gonna
go out on a limb here, because I believe that this is just an oversimplification.
It’s kinda like… there were only so many flavors, and they were like, “What about
umami?” – (laughing) Yeah.
– I feel like it’s the same way with your senses, and there’s something else that
I can’t articulate. That’s the point. So this is false.
There are more senses. You’re right, Link! (correct ding)
Can you smell that science tray? – (crew laughing offscreen)
– It might be coming your way. Yeah, there’s all kinds of senses. They’ve
identified between 14 and 20. Thermoreception: the ability to sense
temperature. The sense of hunger and thirst, the sense of pressure, sense of
balance… – Oh, wow.
– (stammering) …magnetoreception: I said that wrong, but it’s your body’s
ability to sense the earth’s magnetic fields. I don’t do that. I’m not Magneto.
I can’t do that. I’m doing it right now.
I’m doing it right now. That’s what I do when I do the thing.
The common goldfish only has a three second memory span. Science
fact or science fiction? – Well, they always look confused.
– Hm! I hope that’s true. Because I feel bad
for ’em in that aquarium. Every three seconds they’re like,
“Whoa, this is a beautiful place!” – (laughing) Yeah.
– It’s kinda like Dory. I hope this is true. So I’m gonna say false. – You’re right, Link! (correct ding)
– Yes. See, when I start going – against everything I actually think…
– Yeah! Do the opposite… – …it’ll work.
– …of what you think, and life will be – so much simpler! Goldfish can
– Yes. retain memories for up to five months.
Five months of the inside of that – tank, man. It’s like that corner,
– That’s sad. that corner, that corner, that corner,
that little fake, plastic thing… – Well, it’s a globe. There are no corners.
– …food! Oh, at your house. Okay. Your skin
will completely replace itself every 27 days. Science Fact? Science fiction? Every month my skin completely replaces
itself? That sounds… ridonkulous. The skin is the largest
organ on your body. – That’s not the question.
– (laughing) I’m trying to seem smart, and I sounded so stupid when I
said something true. If I can’t even say true things and sound smart, what am I
gonna do when I get this wrong? Let me be more specific. Your epidermis
will completely replace… – True. True.
– …itself every 27 days. – it sounds false, but it’s true. Yes!
– That’s right, Link. (correct ding) – It’s just the epidermis, the outer
– Wow! layer of skin. It will regenerate itself
over 900 times in your lifetime. – That’s amazing.
– That’s why when you get a tattoo… – Have I won?
– …it doesn’t go away, because the tattoo is actually in between the dermis
and the epidermis. It’s under there. – It’s in a nice little tattoo window.
– Oh, yeah. I know that. – So that Nickelback tattoo is safe.
– Tell that to my right buttcheek. And lastly, Link. If you get this right,
you get the tray of science. – It comes down to this.
– At any given moment, you’re only using – about 10% of your brain.
– Me? Personally? People in general. Science fact or
science fiction? Mm. Well, you’ve gotta give me an individual.
I gotta look at ’em. Eddie. Okay, Eddie right now… No, that’s not
fair. I don’t wanna insult Eddie… – …any more today.
– (both laughing) Um… ‘Cause the whole, “You only use
10% of your brain,”… – “Yeah! …Okay.”
– …is false. But at any given moment you’re only using 10% of your brain?
Is true. – You’re wrong. (laughing)
– Oh! (incorrect buzzer) This was a myth that originated when
psychologist William James was completely misquoted. Modern brain scans show that
we use a lot of different parts of our… – brains all the time. Even when we are…
– Constantly. I should’ve known that. – …resting, Link.
– But, but, but… You can’t… It’s electrical impulses, and
you’re only using 10% of it. – I refuse to believe this…
– Well. …for no good reason, except that I wanna
place that back where it goes. – Put it out here.
– Okay. Here you go. This is what – I win. Tray of science!
– ♪ (trombone descending chromatic scale) ♪ – You win getting to put that back.
– Well, I might play with it a little bit. – So have to do work.
– Look at this! All right, hopefully you unlearned
something along with me today. Thanks for liking and commenting
on this video. You know what time it is. I’m [Reagan] from San Antonio,
Texas, but right now I’m at Independence Pass in Colorado.
And it’s time to spin – The Wheel of Mythicality!
– Would you like the simplify everything in your life down to two simple steps?
Well, we do that on our Twitter. You should follow us over there so you
can simplify your life. – And get awesome. All right.
– @rhettandlink! Click through to Good Mythical More,
where you’ve got more questions for me. There’s more to unlearn, people.
Please click through. – Boop ba doo boo bee boo ba!
– ♪ (bells ringing) ♪ – People wining stuff all the time, y’all!
– It’s a fan selfie with… – …therealbenmahn. I do!
– (Link) I don’t have my phone. – ♪ (celebratory fanfare) ♪
– (Rhett) [Look what we get] right here. – Bring him in. Bring Ben in.
– Oh! Kinda… (camera shutter sound) [Captioned by Kevin:
GMM Captioning Team]

100 thoughts on “Don’t Believe These 6 Science Facts”

  1. WWII pilots were never given carrots for night vision, it was a story made up, and put on posters so the Axis would believe that is why the Allies could find their planes at night, when it was really radar.

  2. Hmmm anyone know any other reasons a bat may use echolocation? I had to capture one and release it outside once, and the only reason I found it was due to it's clicks and squeaks it was making while trying to find its way out.

  3. But seeing with your eyes and seeing though echo location uses the same parts of your brain. I watched this thing on the Discovery channel where they had these canes that had censors in the end of it and a pad where your thumb goes. The censors would pick up when there was an object obstructing it and send vibrations that you feel with your thumb on the pad/handle. They conducted the experiment with a blind person and a seeing person with a blindfold on. It activated the same parts of the brain that are stimulated when seeing with your eyes. It was pretty amazing. They even put those same censors and "pads" on a mountain bike and a blind person was able to navigate a mountain bike trail using It! I thought that was amazing.

  4. The myth about carrots helping you see at night is just that, Rhett! It was British "fake news" to keep the axis powers from learning we had radar in WWII, Rhett! Now who is a stupid, Rhett! 🙂

  5. This one is more history than science but, “the Earth is six thousand years old”. Even assuming for the sake of argument that young-Earth creationism is true, that particular estimate was made about 1500 years ago, and people just kept repeating it without updating the figure.
    It’d be like people celebrating the bicentennial Independence Day in 2026.

  6. The myth of carrots improve eye sight is false. The Brits had learned to use radar and used the carrots as a reason their pilots see better.

  7. I love Rhett and Link not even trying anymore with the prizes. Here’s some shit off our table you get to put back. No f***s given.

  8. How does anyone know what's in the middle of the earth they've only been able to drill down not even halfway through the outer crust of the earth! 🤷

  9. Link think about the brian question like this When you get shot in the head you dead 100% of the time and not 10% of the time

  10. heres the problem. you say dont believe theese FACTS. youre confusing me you shouldve said fake science facts. or common misbelief, or science fiction

  11. The mayfly is an insect that lives only for 24 hours. "Dolania americana has the shortest adult lifespan of any mayfly: the adult females of the species live for less than five minutes."

  12. The question should have been, "Humans have only five senses". Because, as it was written, you could answer yes or no and still be right. Saying 'yes' to having five doesn't mean you don't have MORE than five.

  13. The earth's core is made of magma and iron. There's the inner and outer cores. The outer is but not the inner. So he should've gotten a half point.

  14. And also there are MANY parts of our brains that we use yes. We use the entire brain over the day for different things. But only 10 percent of any of it at one percievable time.

  15. Fun fact: The carrots pilots ate in WW2 were supposed to drastically improve the vision of pilots at night … this has been proven to be a myth

  16. We can not sense temperature. We can only sense the change in temperature. The action lab did a good video on this. https://www.youtube.com/watch?v=4lp3fA3xW5s

  17. Really cause the hot does that to me not the cold. It has been proven that changes in temperature can cause sickness easier.

  18. "Humans have five senses" Was actually true not false. Humans do have 5 sense plus many others. If it was worded "Humans ONLY have five senses" then the answer would have been false

  19. I read a book about that "eating carrots will turn you orange thing." It said it's a myth and mentioned the World War II story that you talked about as well.

  20. Gold fish: thisis a beautiful place. Thisis a beautiful place. This is a beautiful place. I wander why im dying so quickly

  21. the "fact" that the british pilots had to eat carrots to see better is actually just lie that was spread by the british government to hide the fact they had radar

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