Scientists aren't sure what color dinosaurs were.
312
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
In zero gravity, a candle's flame is round and blue.
16
A cesium atom in an atomic clock beats over nine billion times a second.
43