If you plan to watch the eclipse, you need to watch this video. My cousin Mark (see some of his writing here) brought this to my attention. It’s on the long side–the key information starts about 1:47 and runs about 10  minutes. But it explains several things to watch for in addition to totality, and talks about an App that will help you get the exact timing for each. If you are watching with a class, these other phenomena can help keep your class engaged throughout the event. If anyone sees Shadow Snakes, I want to hear about them!