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.
21
A man's beard grows fastest when he anticipates sex.
239
Scientists estimate that laughing 100 times is equivalent to a 10-minute workout on a rowing machine.
202
Human thigh bones are stronger than concrete!
63
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
You have no sense of smell when you're sleeping!
72
25% of your bones are located in your feet.
12