Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Tigers can see 6 times better at night than humans.
305
The average person's skin weighs twice as much as their brain.
131
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Obsessive nose picking is called Rhinotillexomania.
101
It takes about 20 seconds for a red blood cell to circle the whole body.
102
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The average person will go on a date at least 100 times before they finally marry.
33