Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The sun is 330,330 times larger than the earth.
75
The average temperature at 40,000 feet above sea level is -60 F.
56
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
One cubic foot of gold weighs more than 1,200 pounds!
78
One third of the electricity produced on earth is used to power electric light bulbs!
75