Enamel is hardest substance in the human body.
61
The average person's skin weighs twice as much as their brain.
131
The human brain has the capacity to store everything that you experience.
4k
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Every year your body replaces 98% of your atoms.
119
Yawns are more contagious among people with closer relationships.
163
One human hair can support 3 ounces.
191