About 400 different kinds of microbes live on and in the human body.
-3
Enamel is hardest substance in the human body.
61
If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
A hard working adult sweats up to 4 gallons per day. Most of the sweat evaporates before a person realizes it's there, though!
25
Motorists who talk on cell phones are more impaired than drunk drivers with blood-alcohol levels exceeding .08!
49
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
The average person who stops smoking requires one hour less sleep a night.
79
Vicks inhalers can cause you to test positive for Meth on drug tests.
41