Scientists aren't sure what color dinosaurs were.
312
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Iron weighs more after it rusts.
16
According to studies, men change their minds two to three times more often than women.
72
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
For every gallon of sea water, you get more than a quarter pound of salt.
45
In zero gravity, a candle's flame is round and blue.
16
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5