Ken Robinson: How to escape education's death valley. Sam Harris: Science can answer moral questions. Michael Shermer on strange beliefs. A robot that flies like a bird. Steven Levitt analyzes crack economics.
Michael Pawlyn: Using nature's genius in architecture. Noreena Hertz: How to use experts -- and when not to. Oliver Sacks: What hallucination reveals about our minds. William Kamkwamba: How I harnessed the wind. Michael Pritchard's water filter turns filthy water drinkable. Aaron Koblin: Artfully visualizing our humanity. Ted string theory.