Yawns are more contagious among people with closer relationships.
163
One human hair can support 3 ounces.
191
When you take a step, you are using up to 200 muscles.
886
Your heart will pump about 212 million liters in its lifetime.
26
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
The average person's skin weighs twice as much as their brain.
131
The largest cell in the human body is the female egg and the smallest is the male sperm.
682