I really hope that you’re not getting too sick of the Neil degrasse Tyson videos. I’m particularly fond of his explainer videos ,of which this is one, for 2 main reasons. Number one, they tend to be shorter and, I don’t know about you, but I really have to be in the mood to watch a video that’s longer than 30 minutes, so I try not to take too much of your time. The second reason is that Neil explains each topic fully and in a way that even Chuck Nice understands, no offense meant, mister Nice. But he also doesn’t make us laypeople feel stupid.