Three hours of music played with a single note — “D”, in seven octaves — is weirdly mesmerizing; I’ve been listening to it while I write my book. (Composer picture above from The New York Times; player above has the album.) A startup that makes paper out of … stone.Before he was shot, Philando Castile was buried in “a mountain of fines”; this is a good NPR investigation of how racism and poverty are worsened by endless niggling fines. Spooky action at great distances: Chinese scientists appear to have successfully entangled two particles that were 1,200 km apart. Cell.js is an intriguing new way to create web apps, with each element containing its own “self driving” DOM. Tarot cards aren’t as old as you might think; they’re an invention of occult-obsessed Paris in 1781.