If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
If you are cold you are more likely to be hungry because you use energy to keep warm.
143
The human brain doesn't stop developing until about 25 years old.
102
One human hair can support 3 ounces.
191
Yawns are more contagious among people with closer relationships.
163
The average person's skin weighs twice as much as their brain.
131