Deep Breathing gives you health benefits similar to aerobics.
39
Fingernails grow nearly 4 times faster than toenails.
31
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
Every time you lick a stamp, you're consuming 1/10 of a calorie!
47
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
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
People who sleep late have more mental stamina and can outperform early risers.
33
When you take a step, you are using up to 200 muscles.
885