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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 most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.