chemistry chemistry

A chemical hearth recently discovered in the walls of the Rotunda at the University of Virginia dates back to its Jeffersonian origins. Dan Addison/University of Virginia Communications hide caption

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Dan Addison/University of Virginia Communications

Vincent Schaefer, one of the General Electric scientists who worked on Project Cirrus in the 1940s, makes snow in the lab using dry ice. General Electric hide caption

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General Electric

Dr. Sawen's Magic Nervine Pills contained calcium, iron, copper and potassium. Despite advertising claiming they were free of lead and mercury, both elements were found in the pills. Courtesy of Mark Benvenuto hide caption

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Courtesy of Mark Benvenuto