Enamel is hardest substance in the human body.
61
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Gorillas can catch human colds and other illnesses.
205
Our Right Lungs takes more air than our left lung.
194
The human brain doesn't stop developing until about 25 years old.
102
The average sperm cell swims at 8 inches per hour.
4
It takes approximately 12 hours for food to entirely digest.
93
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191