There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
A person can live without food for about a month, but only about a week without water.
156
If your DNA was stretched out it would reach to the moon 6,000 times.
256
You see your nose at all times, your brain just chooses to ignore it.
30
The average sperm cell swims at 8 inches per hour.
76
If you hold farts in during the day, they'll just come out when you sleep.
16