Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
A cubic yard of air weighs about 2 pounds at sea level.
31
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
German scientists claim to have evidence that suggests that our universe may exist inside of a computer simulated Matrix.
18
The average home creates more pollution than does the average car.
33
Pumice is the only rock that floats on water.
14
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116