Yawns are more contagious among people with closer relationships.
163
The human brain has the capacity to store everything that you experience.
4k
One human hair can support 3 ounces.
191
All the chemicals in a human body combined are worth about 6.25 euro (if sold separately).
266
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
When you take a step, you are using up to 200 muscles.
886