Joe Palca speaks with Donna Sheehan, who organized a group of 50 women this week to demonstrate in the nude against the war in Iraq. Using their bodies, the women formed the word "peace" in the grass in Point Reyes Station, Calif.
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Joe Palca is a science correspondent for NPR. Since joining NPR in 1992, Palca has covered a range of science topics — everything from biomedical research to astronomy. He is currently focused on the eponymous series, "Joe's Big Idea." Stories in the series explore the minds and motivations of scientists and inventors. Palca is also the founder of NPR Scicommers – A science communication collective.