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
Poor Butterfly Poor Butterfly "Poor Butterfly" is a popular song. It was inspired by Giacomo Puccini's opera "Madame Butterfly" and contains a brief musical quote from the Act two duet "Tutti i fior" in the verse. The music was written by Raymond Hubbell, the lyrics by John L. Golden. The song was published in 1916. It was introduced in the Broadway show "The Big Show", which opened in August 1916 at the New York Hippodrome, and was sung in the show by Sophie Bernard. The song has become a pop standard, recorded by many artists. The two biggest hit versions in 1917