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.