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Your heart beats over 36 million times a year.
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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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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.