Yawns are more contagious among people with closer relationships.
163
Every human spent about half an hour as a single cell.
144
In one day, adult lungs move about 10,000 litres of air.
11
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
On average a woman has 4 sexual partners in her lifetime.
-143