Your thumb is about the same size as your nose.
124
Yawns are more contagious among people with closer relationships.
163
The human body contains over a billion miles of DNA.
147
When you take a step, you are using up to 200 muscles.
886
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
The average sperm cell swims at 8 inches per hour.
76
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111