A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Poor eyesight (myopia) is associated with higher IQ.
232
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
The average person's skin weighs twice as much as their brain.
131
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Every human spent about half an hour as a single cell.
144
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34