After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Yawns are more contagious among people with closer relationships.
163
The human eye blinks an average of 4,200,000 times a year.
233
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
Your heart will pump about 212 million liters in its lifetime.
26