One cubic foot of gold weighs more than 1,200 pounds!
78
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Balsa wood is classified as a hard wood!
41
Scientists are now able to grow 'beating' heart tissue in a lab!
162
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 hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57