In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8
One human hair can support 3 ounces.
191
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
If you hold farts in during the day, they'll just come out when you sleep.
16
Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89