[Main](:start) # General Knowledge ## Automotive - [VIDEO: Differential Steering](https://www.youtube.com/watch?v=yYAw79386WI) - Basics on how they work - [VIDEO: Torque Converters](https://www.youtube.com/watch?v=z5G2zQ_3xTc) - Basics on how they work *([more](https://www.youtube.com/watch?v=bRcDvCj_JPs)*) .. (invented in 1928 in Russia) ## Batteries - [BLOG: 18650 vs. 21700 Lithium Ion Batteries](https://www.knivesandtools.com/en/ct/18650-battery-vs-21700-battery.htm) ## Philosophy - [ARTICLE: What is Modern Stoicism](https://modernstoicism.com/what-is-stoicism/) ## Other - [VIDEO: Changing the Battery on iPhone 6](https://www.youtube.com/watch?v=UgmtNJuqEHI) - [ARTICLE: Proper Maintenance of Apple Trees](https://yardandgarden.extension.iastate.edu/how-to/spray-schedule-home-apple-trees)