Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
All Humans Are 99.9% Genetically Identical and 98.4% of human genes are the same as the genes of a chimpanzee.
51
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Cold water weighs more than hot water.
93
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7