Tigers can see 6 times better at night than humans.
305
The average sperm cell swims at 8 inches per hour.
4
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
Your fingernails grow faster in summer.
744
We share 70% of our DNA with a slug.
218
Yawns are more contagious among people with closer relationships.
163
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127