The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
Likelihood of Developing Type 2 Diabetes Mellitus Based on BMI
Deforestation in developing nations
Oil supply and prices affect the economies of nations