Sometimes discoveries are made because someone was paying attention at the right time. Or something seemed not quite right, hard to understand, or even missing, and the person kept asking questions and didn’t give up. I don’t remember hearing a lot about that when I was a student, but it’s true. Scientists and engineers ask a lot of questions (there are a lot of ones we don’t know the answer to!) and there is at least one behind every science mission.
Heidi Becker, NASA Scientist, Juno Mission radiation monitoring investigation lead