When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The bark of an older redwood tree is fireproof.
65
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Scientists in Germany have developed a candy that doesn't cause cavities.
11
There is a surgical implant being developed that will give you an orgasm at the touch of a button.
20
One barrel of petroleum holds 42 gallons.
20