What I saw on the web on 2026.3.22

[reblogarythm]

1. A 16th century motet for the US President
   by Jonas Wolf
   https://www.youtube.com/watch?v=91CuilQk61U
   well said, sir!
   via siderea
   
   
2. Escher's most mathematically interesting piece
   by M.C.Escher, B. de Smit and H.W. Lenstra Jr., and Grant Sanderson
   https://www.youtube.com/watch?v=ldxFjLJ3rVY
   an excellent deep dive into conformal maps in Escher's print gallery
   via rss