Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
According to studies, men change their minds two to three times more often than women.
72
One cubic foot of gold weighs more than 1,200 pounds!
78
Nearly 50% of the world's scientists are assigned to military projects.
71
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
The average temperature at 40,000 feet above sea level is -60 F.
56
A cesium atom in an atomic clock beats over nine billion times a second.
43