Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Pumice is the only rock that floats on water.
14
The earth is approx. 6,588,000,000,000,000,000 tons.
175
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
One cubic foot of gold weighs more than 1,200 pounds!
78
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17