What are quaternions, and how do you visualize them? A story of four dimensions.

How to think about this 4d number system in our 3d space. Thanks to my modern Medicis: https://www.patreon.com/3blue1brown With extra-special thanks here: http://3b1b.co/quaternion-thanks Quanta article on quaternions: https://www.quantamagazine.org/the-strange-numbers-that-birthed-modern-algebra-2...

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