Held in farts enter your bloodstream and are bad for your body.
26
If you hold farts in during the day, they'll just come out when you sleep.
16
If your DNA was stretched out it would reach to the moon 6,000 times.
256
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The human body contains over a billion miles of DNA.
147
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
The human brain doesn't stop developing until about 25 years old.
102