Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
Tigers can see 6 times better at night than humans.
305
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
It takes about 20 seconds for a red blood cell to circle the whole body.
102