Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
35
Your thumb is about the same size as your nose.
124
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The human eye blinks an average of 4,200,000 times a year.
233
Human hair and fingernails continue to grow after death.
7