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Did you know?
The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
Did you know?
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.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.