The universe is expanding at an ever-accelerating rate, yet we still don't know what much of it is made of. If I had to guess, I'd say that most of it consists of books telling us that the universe is expanding at an ever-accelerating rate. The soaring popularity of popular physics books is a publishing phenomenon.
Every Friday, HuffPost's Culture Shift newsletter helps you figure out which books you should read, art you should check out, movies you should watch and music should listen to. Learn more