Science is full of questions and — when we're very, very, lucky — some of those questions also come with answers. We want to know about the most satisfying response you've ever received to a scientific question and why it worked out so well.
Maybe the response gave you a perfectly-turned explanation for a phenomenon you've long wondered about, maybe the response just highlighted the number of different possible explanations that phenomenon could have, or maybe it was something else entirely that made it so perfect. Whatever it was, make your case for it in the comments right now. But be sure to tell us what the question was that got you the answer in the first place!
Image: The Very Large Array / NRAO/AUI.