Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
If you are cold you are more likely to be hungry because you use energy to keep warm.
144
If you hold farts in during the day, they'll just come out when you sleep.
16
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
The human body contains over a billion miles of DNA.
147
Your thumb is about the same size as your nose.
124
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22