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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
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The longest a person has survived after a heart transplant is 24 years.