Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
In zero gravity, a candle's flame is round and blue.
16
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
The only letter not appearing on the Periodic Table is the letter "J".
180
A cubic yard of air weighs about 2 pounds at sea level.
31