Plus: AI has uncovered a decade-old flaw threatening much of the web. This is today's edition of The Download, our weekday newsletter that provides a daily dose of what's going on in the world of technology. On a December evening in 1959, the physicist Richard Feynman gave a lecture called “There’s Plenty of Room at the Bottom.” There is no physical law stopping us from writing the entire Encyclopædia Britannica on the head of a pin, he argued. We simply had not built the tools yet.