Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Each day, up to 150 species of life become extinct.
-23
Nearly 50% of the world's scientists are assigned to military projects.
71
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Iron weighs more after it rusts.
16
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57