How the Snake Lost Its Legs fly embryo. His books on evolutionary developmental biology (evo-devo) include "Imaginal Discs: The Genetic and Cellular Logic of Pattern Formation" (2002), "Quirks of Human Anatomy: An Evo-Devo Look at the Human Body" (2009), and "Deep Homology? Uncanny Similarities of Humans and Flies Uncovered by Evo-Devo" (2017). In Held's view, "Quirks", "Snake", and "Deep Homology" form a trilogy on evo-devo. "How the Snake Lost Its Legs" is ostensibly organised into six chapters, but in effect into three parts. The first chapter serves as an introduction and overview. The next four chapters provide what Held calls "the meatier aspects of evo-devo" with
The Butterfly that Stamped The male butterfly tells his wife he could stamp his foot and the huge palace garden would disappear in a bid to control her because she is quarreling with him, and as he tells the king "you know how women are". Suleiman bin Daoud finds the claim amusing and calls the butterfly over. After asking the butterfly why he lied, he tells the butterfly that if he has to, he will help him. Meanwhile, Balkis has a talk with the butterfly’s wife, who says she is only pretending to agree with him, because ""you know how men are."" Balkis tells