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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
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.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
There are more bacteria in your mouth than there are people in the world.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.