we will be talking about these two concepts as well as what you are listening to in your podcast this weekend. We will have a session test week 9, and just review formatives for that next weekend. But there will be a lot about relativity coming up, and we did have a minute physics about general relativity last week, so to prep you for what is coming, I thought I would start you with the introduction to the series of videos you will be watching after the test.