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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.
The familiar sounds of your heart are made by the heart's valves as they open and close.
There are 20 feet of blood vessels in each square inch of human skin.
The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.