Nylon is made from coal and petroleum.
42
Each day, up to 150 species of life become extinct.
-23
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Most dust particles in your house come from dead skin.
48
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Scientists aren't sure what color dinosaurs were.
312
Aluminum used to be more valuable than gold!
84
The force of a suction cup is calculated using F=AP.
15