Steven Chu made his name — and earned his Nobel Prize — for developing new ways to control atoms. Now, as secretary of the Department of Energy in the Obama administration, he has taken on the much bigger challenge of transforming the way the world's largest economy powers itself. He is revamping energy research in the United States to pursue more high-risk ideas and he is luring top scientists from other fields into this arena. At the same time, he has made it a mission to help promote the passage of a climate bill in the United States Congress. For these reasons, Nature has selected Chu as its newsmaker of the year.
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2009 Review of the Year
It was the year that saw the first pandemic in 40 years sweep the globe and it concluded with the United Nations climate summit in Copenhagen. Nature looks back at a year that also saw the Large Hadron Collider start pummelling protons and the discovery of water on the Moon.