happy mutants MC Escher's "Relativity" recreated in Star Wars Lego, with many in-jokes and grace-notes Cory Doctorow
copyright M.C. Escher's work will enter public domain in some countries this year but not the United States Mark Frauenfelder
animals Dutch officials permit shooting paintballs at wolves to make the wild animals "less tame" David Pescovitz
optical illusions In this 3D-printed sculpture, how does the ball defy gravity and roll uphill? David Pescovitz
weirdness "More people have been to Berlin than I have" — the strangeness of "Escher sentences" Popkin