Dating back to the 1600's, thermometers were filled with Brandy instead of mercury.
16
When you look up at the blue sky and see white dots flying around, you’re actually seeing your own white blood cells.
30
The brain can stay alive for 4 to 6 minutes without oxygen. After that cells begin die.
193
Scientists estimate that laughing 100 times is equivalent to a 10-minute workout on a rowing machine.
202
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
Brain freeze is caused by the brain sensing the drop of temperature on your palate and increasing blood pressure in an attempt to save you from freezing.
14
The average person who stops smoking requires one hour less sleep a night.
79
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