Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The smell of freshly cut grass is actually a plant distress call.
31
A cesium atom in an atomic clock beats over nine billion times a second.
43
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
One cubic foot of gold weighs more than 1,200 pounds!
78
Iron weighs more after it rusts.
68
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Cold water weighs more than hot water.
93