Printing words in books originated in China with the invention of movable type. But books aren't the only way we've communicated throughout history. Find out who invented the first radio, which complicated code took 267 years to crack, and how cloth weaving inspired computer programs. Fact-packed text and fun illustrations reveal wacky inventions (a machine that translates your dog's barks!) and wayward predictions (the Internet was supposed to collapse in 1996). Learn more about the methods and machines people have used to communicate-from cave paintings and the earliest written alphabets to TVs and computers.