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There are 20 feet of blood vessels in each square inch of human skin.
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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
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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.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
![Martin Van Buren, sitting uncomfortably for this engraving, would eventually ascend to the presidenc](https://biology-forums.com/gallery/47/medium_374628_16_08_15_9_59_54_222701478.jpeg)
![The first commercially successful typewriter, manufactured in quantity beginning in 1874, surely fue](https://biology-forums.com/gallery/47/medium_376716_26_08_15_11_14_05_224411209.jpeg)
![When young infants hold objects for a long period of time they eventually become habituated to them.](https://biology-forums.com/gallery/47/medium_637842_18_01_17_6_02_54_245021528.png)