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Stephen Petranek    

Mars Expert, Technology Forecaster & Author of "How We'll Live on Mars"

Writer and technologist Stephen Petranek became a reluctant doomsayer when his earliest TED Talk (“10 ways the world could end”) racked up 1.5 million views. But Petranek is in fact an optimist who believes that humanity will escape its predicaments -- literally. Within a century, he predicts that humans will have established a city of 80,000 on Mars: and that not only is that plausible, but it’s also inevitable.

Petranek is the editor-in-chief of the Breakthrough Technology Alert, a technology newsletter that ties scientific breakthroughs to investment opportunities. He's the author of the TED Book "How We'll Live on Mars".

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