Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
Yawns are more contagious among people with closer relationships.
163
When you take a step, you are using up to 200 muscles.
885
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
If you are cold you are more likely to be hungry because you use energy to keep warm.
144
It takes about 20 seconds for a red blood cell to circle the whole body.
102