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1. Physics Travel Guide – Physics concepts explained in three levels of difficulty (physicstravelguide.com)
422 points by karlicoss on April 2, 2020 | 36 comments
2. Real Not Complex: Free Math Resources (realnotcomplex.com)
168 points by phonebucket on March 28, 2020 | 25 comments
3. Ask HN: What are your favorite YouTube channels to learn stuff?
418 points by sherlock_h on July 8, 2019 | 138 comments
4. Serveo: Expose Local Servers to the Internet (serveo.net)
202 points by ducaale on June 22, 2019 | 119 comments

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