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
The Ink Spots Of Somebody Else". The Ink Spots' music has been used in the films "Get Low", "Radio Days", "Raging Bull", "Revolutionary Road", "The Shawshank Redemption", "The Aviator", "Iris", "Sphere", "Tree's Lounge", "Malcolm X", "Maria's Lovers", "How to Make an American Quilt", "Men Don't Leave", "Drei D", "Joe Versus The Volcano", "Spontaneous Combustion", "", "Australia", "Hyde Park on Hudson", "The Rover", "Twenty Bucks", "Manchester by the Sea" and "Logorama". The Ink Spots' music has been used in such TV shows as "The Walking Dead", "The Simpsons", "The Visitor", "The Singing Detective", "Sanford", "The Blacklist", "Defiance", "Arrested Development", "Better Call Saul", "White Collar",