the owl and the olive tree

This is totally fascinating. International health, unexpected statistics, context, and debunking myths about the world.

EDIT: Courtesy of mbrubeck, the sequel, which is also excellent, nuances the original speech in a lot of interesting ways, and has an awesome conclusion (watch all the way to the end). And you can play with the software he uses. (So apparently this is a pretty old presentation, but... oh well! I still think it's cool.)