A cubic yard of air weighs about 2 pounds at sea level.
31
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
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Diamonds can be shattered with a hammer.
-104
Sound travels about 4 times faster in water than in air.
408
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3