This week, rediscover the lost art of democratic debate, hear the novel way one man is protecting endangered animals, and learn why exploratory science pays for itself. | In his home of Namibia, John Kasaona is working on a new way to protect endangered animals: giving nearby villagers (including former poachers) responsibility for caring for them. Watch now >> | | Democracy thrives on civil debate, Michael Sandel says -- but we're shamefully out of practice. He leads a fun refresher, with TEDsters sparring over a recent US Supreme Court case. Watch now >> | | The band OK Go dreamed up the idea of a massive Rube Goldberg machine for their next music video -- and Adam Sadowsky's team was charged with building it. He explains how they did it. Watch now >> | | In tough economic times, our exploratory science programs -- from space probes to the LHC -- are first to suffer budget cuts. Brian Cox explains how curiosity-driven science pays for itself. Watch now >> | | The founder of 4chan, a controversial online imageboard, describes its subculture. The talk raises questions about the power -- and price -- of anonymity. Watch now >> | |