For those that don't know, he is a HIGHLY respected researcher and well known for effectively communicating complex topics. He really makes it fun. Often as visually entertaining as 3B1B while diving into more depth. I'd highly recommend people poke through his site and YouTube channel

https://www.cs.cmu.edu/~kmcrane/

https://www.youtube.com/user/keenancrane

https://x.com/keenanisalive?lang=en