The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Iron weighs more after it rusts.
16
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Nylon is made from coal and petroleum.
42
Scientists aren't sure what color dinosaurs were.
312
Pumice is the only rock that floats on water.
14
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11