Can math prevent gerrymandering? (or what I find interesting in math, Dec 2021)

Here are seven good links to pieces on math I thought were good:

1. These are cool:  cool alternative numbers.
2. This is a worthwhile project:  About Project Euler.
3. For fan of   Godel’s Theorems 
4. This was somewhat amazing:  Fermat’s Library : Magic : The Gathering is Turing Complete annotated/explained version. …
5. This was a good intro into a form of math I wasn’t aware of:  Maths in a Minute: Category theory
6. This is fascinating:  The 26 000-Year Astronomical Monument Hidden in Plain Sight.
7. Some practical math:  Virginia wants to prevent gerrymandering. Can a mathematician help?.