The smell of freshly cut grass is actually a plant distress call.
31
Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
5
Sound at the right vibration can bore holes through a solid object.
134
A cubic yard of air weighs about 2 pounds at sea level.
31
Cold water weighs more than hot water.
93
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
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
For every gallon of sea water, you get more than a quarter pound of salt.
45