Since 2002, Geoff has written for Nature on everything from nuclear weapons to science and faith. Prior to working at Nature, Geoff wrote for New Scientist, ScienceNOW, and Physical Review Focus, among others. He contributes occasionally to public radio shows including Marketplace and Science Friday. Geoff holds a double-degree in physics and English from Grinnell College in Iowa, and a master's in science writing from John's Hopkins University. In 2007, he moved from Nature's Washington bureau to London, where he now covers physics, space, and policy from a European perspective.