The White Spots on Ceres Aren't the Only Weird Thing There

When I was kid, we didn't know nearly as much about asteroids as we do now. This was before we had spacecraft visiting them, really high-res radar observations, and all the other amazing tech we have now. I'm not saying we knew nothing --quite a bit was understood-- but things have changed a lot since then. For example, for two centuries we thought of Ceres as the largest asteroid, but now planetary scientists are starting to think of it as a protoplanet, an object that was well on its way to be...