Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Cold water weighs more than hot water.
93
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
The average temperature at 40,000 feet above sea level is -60 F.
56
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18