A map of the Internet from 1969. Some thoughts on the 10X coder. “Braitenberg’s Law” notes that it’s easy to understand a complex robot or piece of code if you wrote it; if someone else did, it’s insanely hard. “Taking turns is a primary expression of justice”: An essay on the moral dimensions of phys ed, from 1922. Meet the Girl Scouts who are earning cybersecurity badges. Why Grenfell Tower burned. My favorite piece of 19th-century punctuation is the “colash”, a colon followed by a m-dash, like this … “:—”. My New York Times Magazine feature on computational thinking and “The Minecraft Generation” from a year ago; and a podcast with me talking about it.