The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
Your heart will pump about 212 million liters in its lifetime.
26
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
The human body contains over a billion miles of DNA.
147
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’
22