Donald Knuth's Christmas pi surprise | Pi - Boing Boing

Donald Knuth’s 2019 ‘Christmas Tree Lecture’ Explores Pi in ‘The Art of Computer Programming’ [David Cassel/The New Stack] 

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Jon Cog writes, "For Christmas, mathematician Donald Knuth shared some great geeky fun. 

Stanford Lecture: Don Knuth - "Pi and The Art of Computer Programming" (2019 



He revealed how for the last 57 years, he's been incorporating the digits of pi into the exercises of his computer programming books -- a whopping 1,700 times. And before long his annual 'Christmas Tree' lecture 'had turned into a kind of intellectual funhouse,' sharing other mind-boggling pi-related miscellanies."  
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Source: Boing Boing and stanfordonline Channel (YouTube)