The United States Supreme Court: a temple to complexity and self-reinforcing feedback loops? Chip Somodevilla/Getty Images hide caption

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Scientists say that the best way to reduce a person's contact with the flame retardant chemicals in sofas and other furniture is to vacuum more. SINAN DONMEZ/iStockphoto.com hide caption

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Service members model the Modified Service Dress Blue Sweater. The Commissioned Corps of the U.S. Public Health Service requires that members wear either the sweater or a windbreaker. Commissioned Corps of The U.S. Public Health Service hide caption

itoggle caption Commissioned Corps of The U.S. Public Health Service