Steampunk is Victorian science. A world where rubber, easy access electricity, and plastics were never invented. Instead we live in a world that uses wood, brass and metal to it's fullest. Everything is useful, and while it can be pretty at times, it's form over function. Think how it would be if the Victorian era never ended, that the things you use today that are considered antiques, are still in use because you don't have modern devices as you do now. These old beat up but fancy items, modified over the years with brass pipe, clockwork and gauges. That's what steampunk is about. It's living the fictional Victorian era today.