All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
22
The human sigh acts as a physiological reset button.
23
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
In one day, adult lungs move about 10,000 litres of air.
11
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
32
If you are cold you are more likely to be hungry because you use energy to keep warm.
144
Your thumb is about the same size as your nose.
124