Cold water weighs more than hot water.
93
One cubic foot of gold weighs more than 1,200 pounds!
78
Pumice is the only rock that floats on water.
14
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
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
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310