Science can be baffling. Sometimes it even looks like magic — take the ultimate bottle flip for example. Watch the video above to find out what natural forces are behind the trick. Then take our science quiz below and find out, are black holes really black? Can animals predict natural disasters? Is yawning contagious? We’ve got the answers to these and other strange science myths.
Sources: National Geographic; LiveScience.com; Space.com; PBS; Mayo Clinic; FEMA; NASA; DOE
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Humans only use 10 percent of their brains.
Humans don’t use 10 percent of their brains, they use more, a lot more. Scientists suggest most, if not all, of the brain is in constant use, even while eating and sleeping.
Yawning is contagious.
Yawning is so contagious, even by just thinking about it. Nobody knows exactly what causes the largely unconscious reaction, but scientists have pin-pointed at least one of the culprits, the deactivation of the brain’s left periamygdalar region, which becomes less active the stronger the urge to yawn.
Black holes are really black.
Since no light can escape from black holes, they are invisible. We can, however, observe black holes by their affect on surrounding materials. Orbit changes or the destruction of objects, like stars.
Cats generally land on their feet.
There may not be credence to the myth that cats have nine lives, but cats do, typically, land on all fours. When falling, cats use the inner ear and eye to align themselves upright, twisting the head, spine and hind legs as they prepare for impact.
Lightning never strikes the same place twice.
Lightning often strikes the same place twice. In fact, lightning tends to reoccur in electric hot spots, striking and re-striking the same place several times during the course of a storm.
Dogs have cleaner mouths than humans.
You’re more likely to catch a cold from another person than a dog. But that doesn’t mean canines are germ free. In fact, doggy mouths are pretty dirty. But while dogs are heavy germ carriers, they typically only host bacteria harmful to other canines.
It takes your body seven years to digest chewing gum.
Bubble gum isn’t digestible. Since the stomach’s enzymes aren’t strong enough to break down the chewy substance, it simply passes through your body.
Animals can predict natural disasters.
Some creatures can actually hear earthquakes, volcanoes and storms before they strike, while others may sense changes in electrical currents associated with natural disasters.
Infinity is a number.
Infinity is not a number. Infinity is infinite (it goes on forever), and can’t carry a real value like normal numbers.
Humans lived with dinosaurs.
Scientists believe dinosaurs died out 59 million years before the earliest humans existed.
Bottle flipping is banned in some parts in my town
I feel smarter already!!!!!!! Im think Im using 20% of my brain!!!!!!!
i did this in class and got 100 so thanks channel one for realizing you are making this show for kids not brainiacts
no humans use more than 10% of there brain no matter what your doing your brain is still working every day even while playing Xbox or sleeping!
yes i do agree with you i didn’t even have to think about this question so its a myth
yes humans use only 10% of our brain but…….I wonder were the rest goes?
Im ok 🙂 🙁
i did this in class and we made an 80 but when i did it at home i made a 100
Yawning is NOT contagious. The reason it seems like that is because the people around you are in the same environment that you are and you yawn to cool down your brain. That is why it seems contagious.
Actually it is contagious, because when you see a person yawning, it triggers an empathetic reaction, causing you to yawn.