Sound travels fifteen times faster through steel than through air.
134
Iron weighs more after it rusts.
16
Hot water can freeze faster than cold water.
181
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
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
German scientists claim to have evidence that suggests that our universe may exist inside of a computer simulated Matrix.
18
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The only letter not appearing on the Periodic Table is the letter "J".
180