| A lemon will float in water, but a lime will sink. |
| Astronauts are subject to fingernail delamination - A process in which spacewalks can cause an astronaut's fingernails to fall off. |
| Astronauts cannot burp in space because there isn't enough gravity to separate the gasses from liquids in the stomach. |
| The acid in your stomach is so powerful it can dissolve a razor blade in less than a week. |
| Studies have proven that sugar does not cause hyperactivity in children. |
| Those bumps on your tongue aren't actually taste buds. They're fungi form papillae -- "Mushroom-shaped nipples" in Latin. |
| Studies have proven that sugar does not cause hyperactivity in children. |
| The only cells that survive from the time you are born until death are in your eye. |
| That sudden jerk you sometimes experience when you "slip" in a dream while half asleep is called a "Hypnic Jerk." |
| Though the hair on your head can live up to seven years, pubic hair can only live for a few weeks. That's why it doesn't grow to braided ponytail lengths. |