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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

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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 important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Interaction web of factors that might influence locust population size. Interaction web of factors that might influence locust population size.
Psoriasis. This photograph demonstrates the characteristic white skin patches of this condition. Psoriasis. This photograph demonstrates the characteristic white skin patches of this condition.
In this cartoon, Boss Tweed welcomes cholera—a skeletal figure of death carrying a handbag from “Asi In this cartoon, Boss Tweed welcomes cholera—a skeletal figure of death carrying a handbag from “Asi
Kenny Scharf, Mural on Houston Street, SoHo, Manhattan, New York. Kenny Scharf, Mural on Houston Street, SoHo, Manhattan, New York.
Frederick Law Olmsted and Calvert Vaux, Central Park, New York City. Frederick Law Olmsted and Calvert Vaux, Central Park, New York City.
WALL PAINTING WITH HORSES, RHINOCEROSES, AND AUROCHS WALL PAINTING WITH HORSES, RHINOCEROSES, AND AUROCHS
Video: Protein Structure - Primary, Secondary, Tertiary and Quaternary

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