In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’
22
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
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
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
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