It takes about 20 seconds for a red blood cell to circle the whole body.
102
Fingernails grow nearly 4 times faster than toenails.
31
Only 1% of bacteria cause disease in humans!
2
Sex burns about 360 calories per hour.
861
Pain occurs when sounds are above 130 db.
123
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Your hair grows faster in the morning than at any other time of day.
91
Household bleach is the recommended chemical to decontaminate people exposed to the anthrax virus, by the U.S. F.D.A.
16