Only humans shed emotional tears.
331
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The human sigh acts as a physiological reset button.
23
The human brain is more active during sleep than during the day.
28
The human brain has the capacity to store everything that you experience.
4k
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
By weight, Bone is five times stronger than steel.
417