10 Things Teachers Taught You Which Are Actually Wrong

1.

Contrary to popular belief, hair and fingernails DON'T grow after death. The skin around them shrinks giving the illusion of growth.

2.

Humans don't blow up or explode if exposed to the vacuum in space. A human being could actually hold their breath in vacuum and survive. Well, for a minute or so.

3.

It's not true that lightning doesn't strike the same place twice.

4.

Sugar doesn't make kids hyperactive. It's a common misconception by parents. There was a study where parents would give kids sugar free treats (not knowing it didn't contain sugar) and they still thought that it made their children hyperactive.

5.

Cracking your knuckles won't cause arthritis. It actually has nothing to do with the bones. It's air pockets between joints that pop, and unless you forcefully dislocate your joints, you won't cause any damage by popping them.

6.

Cut a worm in half and you get two worms. Right? Wrong. Both parts wiggle, but only one part can survive being cut, if it's the part with the brain and mouth.

7.

It doesn't take 7 years to digest chewing gum. Although it's not possible to digest, it won't stay in your stomach. The human body expels gum as waste, undigested.

8.

There's a myth claiming that humans only use 10% of their brains. It's untrue, the brain is in constant use and not all parts can be in use at the same time.

9.

There is a belief that the full moon has an effect on certain people as it affects water inside the brain. It's not true.

10.

If you drop a penny from a tall building, it will not gain enough speed to kill someone. A coin can only achieve a terminal velocity of 65 mph. Enough to hurt, not enough to kill.