Is there one ring to rule them all? Kevin Tucker goes deep into the world of mathematical rings, among other things.

Beautiful weaving of geometry, group theory, and visual art.

The power of monoids strikes again.

Nice review of stuff from 18.C06/18.063.

Very hard to read, but very interesting ideas embedded at the surface regarding the future of mathematics research and design.

Archive of http://www.theophys.kth.se/mathphys/SYM/sym_history.html