Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
One human hair can support 3 ounces.
191
Your thumb is about the same size as your nose.
124
Yawns are more contagious among people with closer relationships.
163
Our Right Lungs takes more air than our left lung.
194
The human body contains over a billion miles of DNA.
147
The largest cell in the human body is the female egg and the smallest is the male sperm.
682