Shame, shame, shame, oh shame on me. I saw the following on John Conway’s Philosophica Neopalaeontographica and have become so obsessed with it that, here I am, stealing it. It’s not, even, really about tetrapods…
… and the accompanying paper (available as a free pdf) is available here. As John says, the word chicken will never seem the same again. Hang around a bit longer, phorusrhacids next… again…