Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The human brain is more active during sleep than during the day.
28
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
The average person's skin weighs twice as much as their brain.
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