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In this interview, outspoken climatologist James E. Hansen reflects on his 30-plus years of studying climate change and warning the public about its dangers. He talks about the most recent developments in climate science and the questions still to be answered.

The Penn State climate scientist who helped author the “hockey stick” global warming temperature graph describes the campaign to discredit him following the theft of emails, including some he wrote, from

The fields of genetic sequencing and synthetic biology have a tried-and-true supporter in Harvard geneticist George Church. While recognizing the potential for misuse in any discipline, from biology to calculus, it is clear to him that

After three terms, 12 years, and countless unprecedented challenges, the IAEA can't help but be changed by its outgoing director-general. Three months before mohamed ElBaradei leaves office, he explains how such an evolution

The head of the u.n. Office for Disarmament affairs pinpoints past arms control efforts that could inspire agreement between nuclear haves and have-nots.