The average sperm cell swims at 8 inches per hour.
76
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
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
One human hair can support 3 ounces.
191
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197