A Peertube backup of Professor Lewin's incredible science lectures from MIT Opencourseware. Youtube previously banned MIT's OpenCourseWare and removed all the videos! The idea of losing these amazing science lectures to a terms of service violation is absolutely unacceptable, so I've decided to back some of these videos up on FBXL Social. Massachusetts Institute of Technology: MIT OpenCouseWare, https://ocw.mit.edu/. License: Creative Commons BY-NC-SA.