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
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
A cubic yard of air weighs about 2 pounds at sea level.
31
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Nearly 50% of the world's scientists are assigned to military projects.
71
Hot water can freeze faster than cold water.
181
In zero gravity, a candle's flame is round and blue.
16
Billions of neutrinos pass unnoticed through your body every second.
6