Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
If the chemical sodium is dropped into water it will immediately and violently explode.
67
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The inventor of the Super Soaker squirt gun was a NASA Scientist who also helped develop the Stealth Bomber and the Galileo mission to Jupiter.
7