Chapter 87: general relativity
87.1 EpicOrganism = AIRoswell = Pan, Yi-Wen15
https://space.bilibili.com/14316464/video
https://www.bilibili.com/video/BV1T5411D7mS
https://www.bilibili.com/video/BV1QA4y1X7Xk
https://www.bilibili.com/video/BV1K34y1i75w
https://www.bilibili.com/video/BV1ZU411o7xL
87.2 Elliot Schneider
- Elliot Schneider: Physics with Elliot