Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
The average person's skin weighs twice as much as their brain.
131
When you take a step, you are using up to 200 muscles.
886
The human body contains over a billion miles of DNA.
147
Our Right Lungs takes more air than our left lung.
194
Enamel is hardest substance in the human body.
61