Kwolek, a DuPont scientist, invented the remarkable fibers ? lightweight, flexible and five times stronger than steel ? that are used around the world in bulletproof body armor.
Source: http://www.npr.org/blogs/thetwo-way/2014/06/20/323951708/stephanie-kwolek-chemist-who-created-kevlar-dies-at-90?ft=1&f=1007
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