dan flies

http://video.ted.com/assets/player/swf/EmbedPlayer.swf

Here is a comment from the TED site:

This one’s a classic. Hans has directed his passion for public health education to the fundamental problem of information accessibility. His efforts (with his students) have been successful enough to drive change throughout the public sector, and serve as an example across disciplines.

His enthusiasm is palpable. This one has earned its place in the top 10.