Safety By sheer dumb luck, an intersection where cyclists and cars can't see each other until seconds before they collide Cory Doctorow

math Lockdown math: trigonometry fundamentals Mark Frauenfelder

recreational math This trig problem kept me up too late last night Mark Frauenfelder

Science The physics of fidget spinners David Pescovitz

geometry How Eratosthenes calculated the circumference of the Earth in 200 BC Mark Frauenfelder

books A revelatory book of photographs taken by visually impaired people Christine Ro

happy mutants Dice so nerdy, they make other dice seem not nerdy Cory Doctorow

physics Elegance, illustrated: heliocentrism vs geocentrism Cory Doctorow

makers New Zealand's lost colossus: all-mechanical racetrack oddsmaking computer Cory Doctorow

copyright Hakim, the Masked Gamer of Minneapolis Rob Beschizza

A nerd’s 12 best and worst films from 2014 Ethan Gilsdorf