What I saw on the web on 2024.9.7

[reblogarythm]

1. Ptolemy’s Theorem and the Almagest: we just found the best visual proof in 2000 years
   by Mathologer
   https://www.youtube.com/watch?v=rr1fzjvqztY
   that is a nice proof, even if it needs to be tweaked a bit for the general case
   via rss
   
   
2. Mark Rober vs Dude Perfect- Ultimate Robot Battle
   by Mark Rober and a pentapartite entity calling itself "Dude Perfect"
   https://www.youtube.com/watch?v=P4gNS0Iiu0Q
   they really shoudln't have told Mark "no rules"
   via rss