You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
A person can live without food for about a month, but only about a week without water.
156
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
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
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59
The human sigh acts as a physiological reset button.
23