Buckminster Fuller's 1943 sleep hack: two hours a day, split into half-hour naps

"Sleep is just a bad habit." So declared Buckminster Fuller, inventor of the geodesic dome, the Dymaxion car, and the Dymaxion house, in a 1943 TIME article announcing his latest innovation: Dymaxion sleep. Fuller's theory was that humans have a primary store of energy that replenishes quickly and a secondary reserve that takes longer to restore.