You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
You see your nose at all times, your brain just chooses to ignore it.
30
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
If you hold farts in during the day, they'll just come out when you sleep.
16
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99