Did any of you attempted to answer the Richard Muller's Presidential Physics Quiz? It sounds like a fun endeavor.
The winner of the quiz has been announced, and there is a very good discussion of each of the question that was asked. There's a lot of science/physics here, and what I like is that this is just the type of estimation/back-of-the-envelope calculation that many scientists resort to in the beginning to come up with some order-of-magnitude answers.
Great stuff! Don't miss it!