The earth is approx. 6,588,000,000,000,000,000 tons.
175
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Pumice is the only rock that floats on water.
14
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304