Every hour one billion cells in the body must be replaced.
17
Scientists estimate that laughing 100 times is equivalent to a 10-minute workout on a rowing machine.
202
Although African-Americans make up only 13% of the U.S. population, they accounted for one half of the estimated new HIV/AIDS diagnoses in 2004.
70
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
More people use blue toothbrushes, than red ones!
66
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
Most lipstick contains fish scales.
37
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127