The average person's skin weighs twice as much as their brain.
131
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
On average, there's 100 billion neurons in the human brain.
83
In one day, adult lungs move about 10,000 litres of air.
11
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Early American humans hunted car-size armadillos and used their shells for houses.
12