An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
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
Babies crawl an average of 200m a day.
212
You can't tickle yourself.
29
The human body contains over a billion miles of DNA.
147
Your fingernails grow faster in summer.
744
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346