If your DNA was stretched out it would reach to the moon 6,000 times.
256
A man's beard grows fastest when he anticipates sex.
239
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
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
All 13 minerals necessary for human life can be found in alcohol beverages.
282
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132