Every sound in a room reaches you twice - directly, and then repeatedly as reflections from every surface. What a room sounds like is almost entirely a question of how…
The whole subject is pressure rather than force. The same push applied through a smaller area produces a higher pressure, and a cutting edge exists to make that area as…
The fundamental constraint is that ink is either present or absent. Everything printers have done for a century and a half is a way of simulating tones that the process…
The whole subject rests on a single exchange: turn something slower and you turn it harder, in precise proportion. Nothing is gained and nothing is free. Here are fourteen consequences.…
There is a class of everyday object where the design solves a problem so completely that the problem becomes invisible, and the pencil is a good example.
The problem is…
There is a category of reform that looks obvious in retrospect and was truly difficult to arrive at, and postal payment is a clean example.
The arrangement that preceded it…