At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Scientists aren't sure what color dinosaurs were.
312
The bark of an older redwood tree is fireproof.
65
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The average temperature at 40,000 feet above sea level is -60 F.
56
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Indoor pollution is 10 times more toxic than outdoor pollution.
62