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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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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.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.