10 Misconceptions Rundown

10) The Great Wall of China is the only man-made
object visible from space. To see something on Earth from space, it would
have to be pretty big, which the great wall of China all 5,000 miles of it certainly is.
But, it’s only 30 feet across at its widest. Here’s a photo taken from the International
Space station, 200 miles above Earth. Can you spot the great wall amid the mountain
tops? Here, right? No, that’s a river, the wall
is actually here. Even if you guessed the right lines buy pure luck, this photo was
taken with a zoom lens, so from the window of the space station it looks more like this
– which pretty clearly makes the Great Wall count as ‘not visible.’
As for the man-made part of this misconception our glorious man-made cities blasting light
into the void certainly are visible. 9) Cracking your knuckles causes arthritis.
Socially obnoxious? Yes. Gives you arthritis later in life as karmic punishment? No.
8) People Only Use 10% of their Brain If you haven’t seen a medical drama in the
past oh, 30 years, you might not be aware that doctors now have machines that can see
inside peoples’ brains and, contrary to popular, belief 90% of the neurons don’t
sit all day around doing nothing. While scientists don’t yet know exactly
what each part does, they do know that all the bits matter.
So if you think someone could scoop out 90% of your brain and you’d still be just fine,
then perhaps you really do only use 10% of it.
7) Eskimos have Hundreds of words for snow This one is technically correct, but misleading.
Some languages, such as German, like to make compound words by running several smaller
ones together which is why German words are sometimes absurdly long.
Inuit languages use compound words as well so rather than say ‘yellow snow’ as you
would in English an Inuit speaker combines the two words into one, but it’s not really
a new word, just a quirk of grammar. So technically Eskimos do have 100s of ways
to describe snow… but then so does every language.
6) You Need 8 Glasses of Water a Day While doubtless some people would benefit
from drinking more water and drinking less crap there is no scientific evidence that
8 glasses of water a day is the required amount and some evidence that it might be too much.
And while we’re talking about water… 5) Tap Water is Bad but Bottled Water is Good
If you live in a paradise free from Government regulations like, say, Somalia, then you might
have good reason to prefer bottled water over tap. But modern, functioning countries have
something called health regulations which cover both kinds of water.
Also, water is extremely dense making transporting it from those pristine mountain tops and glaciers
enormously expensive which is why bottled water companies don’t bother.
‘Bottled’ water is often just local tap water with a fancy label and an enormous markup.
4) Gum takes seven years to pass through your digestive system.
This is pretty easy to disprove yourself but it’s understandable why most people don’t
try the experiment. 3) Blood in Your Veins is Blue
The idea here is that the blood in veins is blue and it only turns red when exposed to
the oxygen in the air. Thinking this isn’t unreasonable, after
all your veins look blue and medical diagrams show arteries as red and veins as blue, but
it’s the same mistake as thinking that mountain dew is green because it’s in a green bottle.
Pour it out and you discover that Mountain Dew is really piss yellow, which is probably
the reason it’s in a green bottle to begin with.
The next time you get blood withdrawn from a veins take a look. What color it is? Red.
How much oxygen is inside a good syringe? None.
Unless you’re a Horseshoe crab or Plavalaguna you’re blood isn’t blue.
2) Fan Death This misconception is a specialty of South
Korea. Here the belief is that if you spend too much time with a rotating fan in a confined
space, it will use up all your oxygen and you’ll asphyxiate to death.
Exactly how the fan made of lifeless, anaerobic plastic, competes for your oxygen is unclear,
but hilariously South Korean fan manufacturers – who surely must know better – include
timers on fans to prevent them from running too long.
1) People Swallow 8 Spiders a Year While Sleeping Supposedly while you’re in bed, helplessly
unconscious with your gob wide open, each year eight spiders find their way into your
mouth and you reflexively swallow them. This is plainly ridiculous: spiders love warm,
moist places so eight is far too low an estimate.

  1. That 8 spiders thing is actually a kinda fascinating story about how to intentionally spread misinformation on the internet.

  2. Unless you live in Antarctica or the Sahara Desert. If you look at it that way life there might be better!

  3. The spider one was made up to show how people believe stats like 8 spiders per year, it was meant to be too dumb to believe, hence the first statement

  4. The average amount of spiders eaten in a lifetime while sleeping is zero. Spiders tend not to let themselves get eaten.

  5. As a South Korean I'm both impressed and ashamed that fan death made it on the list…many Koreans actually believe it's a real thing

  6. No one: any compound words you know?
    Katy Perry: justbecauseitsoverdoesntmeanitsrealloverandifyouthinkitovermaybeyoullbecomingoveragain

  7. When you said so does every language you had the American flag and British flag even though both of those countries speak the same language brits just have an accent

  8. 2:06 What the actual fuck? My country isn't there! Or, well, it is a part of the EU, so I suppose it is there.

    You have managed to distort each of these "misconceptions" so far from their original context as to make them meaningless!

  10. Damn I always thought blood in my veins was blue. You just reeducated me after 15 years of believing that. 😀

  11. I am scared as shit, why do u do this why do u give me nightmares u asshole, I hope u were joking
    Edit:thank it was a joke

  12. I will rip out your throat and shit on your dangling toungue good god i fucking hate godamn spiders

  13. Lemme ruin this channel for you, simply for that last fact. CGP looks like a man with one leg jerking off.

  14. "8 spiders do not go into your mouth each year"

    Ok good-

    "Spiders like warm dark places, so 8 is far too low and estimate"


  15. Regarding the spider myth taken from snopes.com:

    So how did this claim arise? In a 1993 PC Professional article, columnist Lisa Holst wrote about the ubiquitous lists of “facts” that were circulating via e-mail and how readily they were accepted as truthful by gullible recipients. To demonstrate her point, Holst offered her own made-up list of equally ridiculous “facts,” among which was the statistic cited above about the average person’s swallowing eight spiders per year, which she took from a collection of common misbeliefs printed in a 1954 book on insect folklore. In a delicious irony, Holst’s propagation of this false “fact” has spurred it into becoming one of the most widely-circulated bits of misinformation to be found on the Internet.

  16. That whole thing about only using 10% of your brain. Let's go back to middle school biology and you'll remember that the brain is made up of neurons and glial. They may have said gray cells and white cells or gray matter and white matter. The gray matter is what we used to think on its the outside of the brain and it has a huge surface area but not a lot of weight. the white cells are the structure that provides nutrition and Scaffolding for the gray cells to sit on. White matter out weighs grey matter by a factor of 50 to 1 so if you're thinking we use the brain for thinking, we use far less than 10% of our brain for thinking most of the brain it's just structure for the gray cells to work on.
    I think this is the Genesis for that we only use 10% of our brain matter

  17. Man that last one freaked me out probably just as much as the first time hearing it years and years ago as it did just now hearing it again and having forgotten that it's just a joke.

  18. Tap water is probably at least as good as bottled water, unless you live in one of those backwards nations where the public water supply can't be trusted to be safe, like Honduras or Malawi or the United States of America.

  19. Also, isn't the 10% myth meant to be more functional than anatomical? I don't think I've ever met anyone who believes that 90% of the nervous tissue in your skull is literally a useless ballast and a mistake of evolution; I think what people believe is that modern life is way too easy and most people don't bother to learn critical thinking, mathematical or logical reasoning, hone their skill at memorization, etc., and would be capable of significantly more impressive mental feats if they put in the effort. Which is probably true. How many playing cards can a typical person learn, with a bit of training, to memorize in sequence? At least a full deck of 52 cards. How many cards in a sequence can most people memorize on the spot? Probably about 5 or 6. Ten per cent was probably never meant literally, but it seems a decent extemporaneous estimate to me!

  20. I heard the fan death thing is a way for cops to cover up suicides. Not as in keep the numbers down but to keep the family safe from the stigma.

  21. For number 8 that’s not what people think. We don’t think that we just have a little sludge of grey matter for a brain. We just use a small amount of the capacity our brain has.

    Think of it like driving a super car… at 20 mph. That’s not using half a wheel and part of an engine. That’s just using a small amount of the capability the car has

  22. Most inuit and yupik people find the term 'eskimo' to be offensive. There is no reason for you to use it here.

  23. Why does everyone(including you Mr. Narrator) get the 10% of the brain thing wrong. It’s easy to explain, yes we use 100% of our brains, but we only use 10% of our potential brain capabilities. I hope that makes sense I get so frustrated when people get that wrong.

  24. You forgot misconception #11. People still think these first 10 misconceptions are factual. I’m pretty sure the last million misconceptions videos talked about how these aren’t facts. Despite the fact that a million videos ago no one thought they were.

  25. I got in a huge arguement with all my cousins, one of which was in medical college, over was blood red or blue. I said it was red. It is maroon in the vein.

  26. "bottled water is not better than tap water in functioning countries"
    >shows america
    flint Michigan: "i am i joke to you"

    also here in britland the tap water is orange/brown a few times a year. maybe due to maintenance idk.

  27. Space station huh? Haha. Thats a good one .. havent you seen the videos of the so called astroNOTs suspended on wire…?? Its all CGI …the freemasons have fooled many people ..you being one of them…

  28. The 10% o the brain has some truth, its just misleading wording.
    Only 10% of cells/neurones ever ‘activate’ at one time, but they all get their turn. The brain uses up a massive portion of our energy and using 100% of it would need impossible amounts of energy

    You dont die 1/10 times when you get shot in the head

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