Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
The force of a suction cup is calculated using F=AP.
15
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The average temperature at 40,000 feet above sea level is -60 F.
56
Scientists aren't sure what color dinosaurs were.
312
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101