Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
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.
34
Your thumb is about the same size as your nose.
124
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
The average person will go on a date at least 100 times before they finally marry.
33
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21