The human eye blinks an average of 4,200,000 times a year.
233
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The human brain is more active during sleep than during the day.
28
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
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
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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