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footage Pentagon: UFO vids show trash, drones Rob Beschizza

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books Flatland is one of my favorite Math(ish) books Mark Frauenfelder

makers My favorite maker tips for 2021 Gareth Branwyn

mathematics The chaos game creates patterns from random dice rolls Andrea James

video Billy Ocean's Loverboy video is way weirder than you remember Janelle Hessig

tennis anyone? Bustin' Balls: World Team Tennis 1974-1978, Pro Sports, Pop Culture, and Progressive Politics Mark Frauenfelder

math Hexagons are the bestagons Andrea James

recursion Amazing in-camera patterns with a video feedback kinetic sculpture Andrea James

makers Revisiting Make:'s weekly Math Monday column Gareth Branwyn

mistakes Raytracing with MySQL Rob Beschizza

cars Wedged Wonders: pointy concept cars of the seventies Rob Beschizza

laser cutter The Polygonia Design Suite, a web app for easily creating symmetrical, repeating patterns and designs Gareth Branwyn

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law For the best of reasons, The Slants won the right to trademark racially offensive slurs — and now there's rather a lot of that Cory Doctorow