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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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There are more nerve cells in one human brain than there are stars in the Milky Way.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
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There are more bacteria in your mouth than there are people in the world.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.