The first talk in the Mathigon Guest Speaker series was last week. Dr. James Tanton shared 12 proofs that 2 = 1. It was a joy-filled and engaging session. Watch the talk at https://www.youtube.com/watch?v=JbbU4GgpXLk. I think you'll find it worth your time! Sign up for future events in the Guest Speaker Series at mathigon.org/events.