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33 Facts You Learned in School That Are Completely Wrong

If you really think back to everything you learned as a kid, you'll probably realise how inaccurate a lot of the stuff was. Whether it was taught directly in the classroom or told by your parents, much of what we've always assumed as common knowledge is flawed. Prepare to be surprised by the 35 false facts ahead.

Chameleons camouflage to blend in.
Vincent van Gogh cut off his own ear.
Dogs have cleaner mouths than humans.
Bats are blind.
Pluto isn't a planet.
Goldfish only have a three-second memory.
Isaac Newton discovered gravity when an apple fell on his head.
The blood in your veins is blue.
Bulls get angry at the sight of red.
Camels store water in their humps.
Your nails keep growing after you die.
We only have five senses.
There's no gravity in space.
The primary colours are red, blue, and yellow.
The North Star is the brightest star.
Lightning never strikes more than twice.
Einstein was a failing student.
Humans evolved from monkeys.
Classical music makes you smarter.
You can see the Great Wall of China from space.
Ben Franklin discovered electricity while flying a kite.
Dogs are colour-blind.
It takes seven years to digest chewing gum.
We eat eight spiders a year during our sleep.
We only use 10 percent of our brains.
Thomas Edison invented the lightbulb.
Seasons have to do with the Earth's proximity to the sun.
Throwing a penny off a skyscraper can kill someone below.
It's not safe to wake up sleepwalkers.
Christopher Columbus thought the world was flat.
Toilet water flushes the opposite direction depending on the hemisphere.
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