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The horizontal fraction bar was introduced by the Arabs.
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There are 20 feet of blood vessels in each square inch of human skin.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.