If you are cold you are more likely to be hungry because you use energy to keep warm.
143
The average sperm cell swims at 8 inches per hour.
76
The human body contains over a billion miles of DNA.
147
Yawns are more contagious among people with closer relationships.
163
Enamel is hardest substance in the human body.
61
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
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515