You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The human brain doesn't stop developing until about 25 years old.
102
The average person's skin weighs twice as much as their brain.
131
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89