Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The average temperature at 40,000 feet above sea level is -60 F.
56
Pure water (H2O) does not conduct electricity on its own.
46
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Cold water weighs more than hot water.
93
In zero gravity, a candle's flame is round and blue.
16
Most dust particles in your house come from dead skin.
48