Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Out of all the senses, smell is most closely linked to memory.
146
A cubic yard of air weighs about 2 pounds at sea level.
31
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
The average home creates more pollution than does the average car.
33
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
One third of the electricity produced on earth is used to power electric light bulbs!
75