It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
The average sperm cell swims at 8 inches per hour.
76
It takes about 20 seconds for a red blood cell to circle the whole body.
102
The human brain doesn't stop developing until about 25 years old.
102
The human body contains over a billion miles of DNA.
147
Every year your body replaces 98% of your atoms.
119
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
Our Right Lungs takes more air than our left lung.
194