CHAPTER 15 ANOTHER DIMENSION
Harry and Ron were so upset at being insulted by the Rolling Stones, that they together cast a spell and entered into another dimension! They were the first to prove that time travel was possible. Harry and Ron went back to what they thought was Hogwarts. But they found it had changed.
For one, Hermione practiced magick in a mansion in the woods under the name Ecric. Second, Colin Creavey was mostly less annoying. Third, the school was now known as Warthogs. Other than those, things were pretty much the same. Fourthly, Harry in this dimension carried a walking stick which he used to beat on anyone who insulted the King.
Note: there is no guarantee that other dimensions are completely different. In fact, there might be some with only two or three small differences. The fact that there were only a couple differences should not diminish from the boys' accomplishment.
Ron seemed very upset by the whole episode, so Harry cast a new spell and the boys returned to their own time and space. The whole episode seemed to take only about thirty minutes, but it was really six months. A lot had happened in six months.
Harry imparted his knowledge to muggle Stephen Hawking, who then took credit for inventing space-time.