"The best part is problem solving and puzzles. Putting together pieces from different things that have bounced around your brain because you've been working on it for a long time, and when something comes together and it works out, it's incredibly satisfying."

Tim Hall always wanted to be a scientist. An analytical mind and boyhood fascination with black holes and the origin of the universe guided him to where could continue pondering big questions - the NASA Goddard Institute for Space Studies, where he is a Senior Research Scientist.