Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
The human sigh acts as a physiological reset button.
23
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
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
Mushrooms are more closely related to humans than they are to plants.
47
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
You can't tickle yourself.
29