Hawking's warning a couple weeks ago got a lot of attention. I found this discussion from On Point fascinating. It's not my area of expertise, but it was a great conversation. I didn't know Jill Tarter was the inspiration for Contact's protagonist. I haven't read the book (so much I haven't read.) but the movie was really good--until the end. What a cop-out.
You'll never hear the whirring sound of a projector again.