Chelen Johnson
I found it most interesting to see the scientific process in action. Scientists were questioning scientists, sometimes fairly aggressively.
I think that the most surprising thing about it was how young everyone was! I absolutely did not expect that, maybe because the amateur community is so much older by comparison, and is mainly composed of retired people.
My robotics students are very wowed by the fact that I met a flight director for the Mars Curiosity Rover.
