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
How Many Fucks song with a heavy beat. Erica Russell from Pop Crush called it a "bouncy electro-pop/hip-hop track" that confirms Jayne's "philosophy" of "take nothing seriously". After its release, "How Many Fucks" received generally favorable reviews from contemporary music critics. In a highly positive review, Julia Brucculieri of "The Huffington Post" praised both the track and its corresponding video for being catchy and sexy. Erika Harwood of MTV called it "perfect", while Jordan Miller of BreatheHeavy praised it for being "fire". Idolator's Mike Wass was more critical of the song, describing it as a "parody of her old material". Jessica P. Ogilvie