Topic for Valentines Day physics Zoom: The sum over all possible universes

 Heavy stuff!

https://www.quantamagazine.org/how-our-reality-may-be-a-sum-of-all-possible-realities-20230206/

This image is from what I still find the very best schematic presentation of these ideas: this video from ScienceClic https://youtu.be/MmG2ah5Df4g