【中字】分球怪论The Banach–Tarski Paradox@阿尔法小分队科教组

Vsauce's roughly 24 minute explainer on the Banach-Tarski paradox, building from infinity and set theory to the decomposition of a sphere into pieces that form two spheres.

Why HN likes it: Recommended as an accurate, entertaining on-ramp to set theory and infinity, worth pausing and rewatching.

“This vsauce video is actually a really accurate (and entertaining!) introduction to set theory”