You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’
22
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The human brain doesn't stop developing until about 25 years old.
102
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
32
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73