It sounds like science fiction, but journalist Stephen Petranek considers it fact: within 20 years, humans will live on Mars. In this provocative talk, Petranek makes the case that humans will become a spacefaring species and describes in fascinating detail how we'll make Mars our next home. "Humans will survive no matter what happens on Earth," Petranek says. "We will never be the last of our kind."
听起来像是科幻小说，但是记者斯蒂芬·彼得雷内克（Stephen Petranek）认为：20年之内人类将在火星居住。在这场令人兴奋的演讲中， 彼得雷内克认为人类将成为航天物种并且详细地说明了如何让火星成为第二个家园。“这意味着无论地球发生什么，我们都不会灭绝，” 斯蒂芬·彼得雷内克说，“我们这一代绝不会灭亡。”
