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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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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 20 feet of blood vessels in each square inch of human skin.

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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

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