Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Nearly 50% of the world's scientists are assigned to military projects.
71
Iron weighs more after it rusts.
68
Most dust particles in your house are made from dead skin!
67