From seanmcarroll https://twitter.com/seanmcarroll on Twitter: Joe Polchinski, brilliant and beloved theoretical physicist at KITP at UC Santa Barbara, died this morning after a long struggle with cancer. One of my favorite thinkers and one of my favorite people. https://twitter.com/seanmcarroll/status/959633818549305346/photo/1 https://chirp.cooleysekula.net/attachment/48005