查看完整课程: http://ed.ted.com/lessons/where-did-russia-come-from-alex-gendler 俄罗斯是世界上最大的国家，占地球陆地面积的八分之一。但它最初是如何诞生的呢？Alex Gendler 探索了基辅罗斯史诗般的历史，维京人、西方十字军、拜占庭传教士和蒙古大军都在其中发挥了作用，创造了一个矗立在文化和地理交汇处的独特文明。 Alex Gendler 授课，Draško Ivezić 制作动画。
David Lang is a maker who taught himself to become an amateur oceanographer -- or, he taught a robot to be one for him. In a charming talk Lang, a TED Fellow, shows how he and a network of ocean lovers teamed up to build open-sourced, low-cost underwater explorers.nnTEDTalks is a daily video podcast
View full lesson: http://ed.ted.com/lessons/the-language-of-lying-noah-zandan We hear anywhere from 10 to 200 lies a day. And although we’ve spent much of our history coming up with ways to detect these lies by tracking physiological changes in their tellers, these methods have proved unreliable. I
View full lesson: http://ed.ted.com/lessons/a-guide-to-the-energy-of-the-earth-joshua-m-sneideman Energy is neither created nor destroyed — and yet the global demand for it continues to increase. But where does energy come from, and where does it go? Joshua M. Sneideman examines the many ways in wh
