Your heart will pump about 212 million liters in its lifetime.
26
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Enamel is hardest substance in the human body.
61
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
A person can live without food for about a month, but only about a week without water.
156
The human sigh acts as a physiological reset button.
23
In one day, adult lungs move about 10,000 litres of air.
11
