An eel is something you don’t see every day, so I like to leave reminders of the wonder of the natural world; but I am partial to earth science as what is what I do. There are a lot of science with cars, creativity is encouraged. I am trying to do something a little different than pure filing an item into categories. And, it’s a science sub, so experimenting is encouraged. I try to prune lightly, especially if something creates interesting discourse. Use best judgement to fit the vibe, rather than black and white rules.