Iron weighs more after it rusts.
68
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
The sun is 330,330 times larger than the earth.
75
Cold water weighs more than hot water.
93
Pumice is the only rock that floats on water.
14
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17