Pumice is the only rock that floats on water.
14
Iron weighs more after it rusts.
16
A cesium atom in an atomic clock beats over nine billion times a second.
43
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
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Most dust particles in your house are made from dead skin!
67
Scientists are now able to grow 'beating' heart tissue in a lab!
162