The earth is approx. 6,588,000,000,000,000,000 tons.
175
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Pumice is the only rock that floats on water.
14
Scientists aren't sure what color dinosaurs were.
312
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
A cesium atom in an atomic clock beats over nine billion times a second.
43
Iron weighs more after it rusts.
16