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
Butterfly (Mariah Carey song) Butterfly (Mariah Carey song) "Butterfly" is a song by American singer and songwriter Mariah Carey. It was released on December 1, 1997, by Columbia Records as the second single from her sixth studio album "Butterfly" (1997). The song was written and produced by Carey and Walter Afanasieff. "Butterfly" is a pop ballad combining elements of R&B and gospel. Carey had originally conceived it as a house record with David Morales titled "Fly Away (Butterfly Reprise)". After realizing how personal the lyrics were and how they could be applied to "Butterfly", she wrote the album's title track with Afanasieff. On the