Stephanie Kwolek and others of the DuPont group that developed Kevlar. Left to right, Kwolek, Herbert Blades, Paul W. Morgan, and Joseph L. Rivers Jr. Gift of Stephanie Kwolek. Courtesy DuPont.

Stephanie Kwolek and others of the DuPont group that developed Kevlar. Left to right, Kwolek, Herbert Blades, Paul W. Morgan, and Joseph L. Rivers Jr.

Gift of Stephanie Kwolek. Courtesy DuPont.