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Maybe goodbye isn\u2019t forever. Get ready to mingle with mammoths and gaze upon a ground sloth. Scientists want to give some animals a round-trip ticket back from oblivion. Learn how we might go from scraps of extinct DNA to creating live previously-extinct animals, and the man who claims it\u2019s his mission to repopulate the skies with passenger pigeons.\nBut even if we have the tools to bring vanished animals back, should we?\nPlus, the extinction of our own species: are we engineering the end of humans via our technology?\nGuests:\n\n\nBeth Shapiro \u2013 Associate professor of ecology and evolutionary biology, University of California, Santa Cruz\n\n\nBen Novak \u2013 Biologist, Revive and Restore project at the Long Now Foundation, visiting biologist at the University of California, Santa Cruz\n\n\nHank Greely \u2013 Lawyer working in bioethics, director of the Stanford Center for Law and the Biosciences at Stanford University\n\n\nMelanie Challenger \u2013 Poet, writer, author of On Extinction: How We Became Estranged from Nature\n\n\n\nNick Bostrom \u2013 Director of the Future of Humanity Institute, Oxford University\n\nDescripci\xf3n en espa\xf1ol\nFirst released April 29, 2013.\nLearn more about your ad choices. Visit megaphone.fm/adchoices