Comment Science Fair (Score 1) 27
A girl in my highschool back in 1988 was used voyager I or II photos (I can't recall which) to calculate the depth of craters on a couple of Jupiter's moons. Which is little different than what the article is describing, but it seems shadows have a lot more information encoded in them. This girl and I ended up winning the science fair and going on to the International science fair, where I felt a bit out of my league. She won a few awards. Apparently at that point no one had thought to do that up to that point. (for those interested, I wired up a photometer to an Apple II and wrote some software to automate variable star photometry, which measures the light from light sources through a telescope over time. It can be used to find the rotation of asteriods, or with a sensitive enough instrument, the change in light from a large planet orbiting a star, stuff like that.)