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 Licks? Neptunes has additional vocals from American artists Kelis, Lil' Cease, and Snoop Dogg. "How Many Licks?" was praised by music critics after its release and in retrospective reviews; the Neptunes remix also received positive reviews. However, African-American studies professor Mark Anthony Neal criticized the song's treatment of black female sexuality. Commentators compared its content to Trinidadian-American rapper Nicki Minaj's 2014 single, "Anaconda". "How Many Licks?" peaked at number 75 on the "Billboard" Hot 100 chart and charted in several other countries, but was not as commercially successful as Lil' Kim's previous releases. The song's music video was directed by Francis