In zero gravity, a candle's flame is round and blue.
16
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
For every gallon of sea water, you get more than a quarter pound of salt.
45
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
One third of the electricity produced on earth is used to power electric light bulbs!
75
The average temperature at 40,000 feet above sea level is -60 F.
56