Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59
The average sperm cell swims at 8 inches per hour.
76
Your body is creating and killing about 2.4 million red blood cells per second.
17
The human brain uses approximately as much energy as a 10 watt light bulb.
120
Our Right Lungs takes more air than our left lung.
194
All the chemicals in a human body combined are worth about 6.25 euro (if sold separately).
266
Poor eyesight (myopia) is associated with higher IQ.
232