Whatever you think of PZ Myers, his writing on biological topics is indispensable when it comes to correcting common misunderstandings and misrepresentations about evolution. His latest article, dissecting the newest draft of the platypus genome and its implications for evolutionary taxonomy, is a must read.
The platypus used to be a favorite of creationists: it was a supposed chimera of different animal kingdoms and supposedly a startling mystery for evolution’s picture of common descent. These days, however, creationists have mainly given it up as a lost cause: getting exposed as so wrong, so many times, gets humiliating. Instead, it’s the modern news media, always awash in its rarely updated panoply of stereotypes and clichés, that still gives us breathlessly confused descriptions of the platypus as a “part bird, part reptile and part lactating mammal.”
Understanding what the various “strange” features of the platypus really are and how they fit into the larger history of mammals is essential for anyone who wants to understand how evolutionary biology really works.