If you hold farts in during the day, they'll just come out when you sleep.
16
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
32
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
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
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
The human sigh acts as a physiological reset button.
23
A person can live without food for about a month, but only about a week without water.
156