If the human eye was a digital camera, it would have 576 megapixels.
25
Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
252
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Enamel is hardest substance in the human body.
61
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
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