I just picked up on this today on Science Friday (on NPR). This was a challenge put to the public that apparently received worldwide responses to come up with the best explanation of what a flame is (with 11-year olds as the target audience). I think the winner is very well done... I sure learned something. This was put on by the Center for Communicating Science, and they're already looking for the next challenge question: http://www.flamechallenge.org/
