Can we prevent the end of the world?

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August 25, 2014 Today's TED Talk Martin Rees: Can we prevent the end of the world? 06:52 minutes · Filmed Mar 2014 · Posted Aug 2014 · TED2014 A post-apocalyptic Earth, emptied of humans, seems like the stuff of science fiction TV and movies. But in this short, surprising talk, Lord Martin Rees asks us to think about our real existential risks — natural and human-made threats that could wipe out humanity. As a concerned member of the human race, he asks: What’s the worst thing that could possibly happen? Lord Martin Rees, one of the world's most eminent astronomers, is an emeritus professor of cosmology and astrophysics at the University of Cambridge and the UK's Astronomer Royal. He is one of our key thinkers on the future of humanity in the cosmos. Watch now » Quote of the Day “ Once scientists became members of a professional group, they were slowly walled off from the rest of us." Laura Snyder Laura Snyder: The Philosophical Breakfast Club Become a Fan on Facebook Follow us @TEDNews | @TEDTalks News, speakers, Q&As and more: TEDBlog Get the TED app for iPhone, iPad, and Android

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