How the Snake Lost Its Legs the butterfly, the snake, and the cheetah. Each consists of three to eight sections named in the style of Rudyard Kipling's "Just So Stories", with titles like "How the butterfly got its spots" or "How the snake elongated its body", though a couple of sections use "Why?" rather than "How?", as in "Why the fly twirls his penis" (it rotates during embryonic development under the control of different genes). In these chapters, Held explains the mechanics of evolutionary developmental biology, complete with accounts of what genes such as hox, hedgehog, and engrailed do to shape bodies. The third part is
How Music Got Free How Music Got Free How Music Got Free: The End of an Industry, the Turn of the Century, and the Patient Zero of Piracy (Also published as How Music Got Free: What Happens When an Entire Generation Commits the Same Crime?, How Music Got Free: The Inventor, The Mogul and the Thief, and How Music Got Free: A Story of Obsession and Invention) is a non-fiction book by journalist Stephen Witt. The book chronicles the invention of the MP3 format for audio information, detailing the efforts by researchers such as Karlheinz Brandenburg to analyze human hearing and successfully compress songs