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Author Question: The flatness problem states that a. the density of the Universe is very close to the critical ... (Read 87 times) |
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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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.