Stephanie Kwolek prepares a polymerization experiment at DuPont's Pioneering Research Lab in 1967. Kwolek, who died Wednesday, made the breakthrough discovery that led to the invention of Kevlar. DuPont hide caption

itoggle caption DuPont

Horace Silver performs for television in Copenhagen, Denmark, in 1979. JazzSign/Lebrecht Music & Arts/Corbis hide caption

itoggle caption JazzSign/Lebrecht Music & Arts/Corbis

Charles Barsotti created more than a thousand cartoons for the New Yorker, many of which featured a series of round-snouted dogs just like this hapless pair. Charles Barsotti/ Courtesy of the New Yorker hide caption

itoggle caption Charles Barsotti/ Courtesy of the New Yorker