It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
All the chemicals in a human body combined are worth about 6.25 euro (if sold separately).
266
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
The average person's skin weighs twice as much as their brain.
131
The average sperm cell swims at 8 inches per hour.
76
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18