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 Ian Direach got the Blue Falcon How Ian Direach got the Blue Falcon "How Ian Direach got the Blue Falcon" is a Scottish fairy tale, collected by John Francis Campbell in "Popular Tales of the West Highlands". He recorded it from a quarryman in Knockderry, Roseneath, named Angus Campbell. Andrew Lang included it in "The Orange Fairy Book". A king and a queen had a son, Ian. When Ian was almost grown to a man, his mother died, and his father remarried. One day Ian went hunting and shot at a blue falcon, knocking off a feather. His stepmother cursed him until he found her the