A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
On average a woman has 4 sexual partners in her lifetime.
-143
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
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
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
The human sigh acts as a physiological reset button.
23
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132