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You're quite welcome. And the last one here for tonight is about radio waves from the universe. It may have the ability to reveal in dark matter. And before I get into this one, dark matter. They're trying to find more and more creative ways to find it. Dark matter doesn't interact with ordinary matter, so therefore setting up an experiment would be impossible. Any experiment that would be put together for this would require ordinary or periodic matter to perform the experiment. Because dark matter doesn't interact with anything that we're used to, there's nothing experimental we can actually do. Except indirect observation. We see indirect observation from looking in a region of space and suddenly see light being dense, like I see rings, gravitational lensing, that sort of thing. And you realize something very massive is in that area and that gives an indication that there's dark matter as well. If you add up all the mass in the universe, all the matter of mass in the universe, to stop it.