In zero gravity, a candle's flame is round and blue.
16
The average temperature at 40,000 feet above sea level is -60 F.
56
Your brain is 80% water.
525
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Billions of neutrinos pass unnoticed through your body every second.
6
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
German chemists made a replica of a trophy the size of one molecule.
68