When I bought Why Elephants Have Big Ears: And Other Riddles from the Natural World, I thought I might get some real concrete facts in the debate of evolution. I must admit, I was disappointed. The problem is that Biology is not a Science like Mathematics or Physics where theories are subjected to the Scientific Method and a truth or law is proven and once done does not change based on the pressure of factions or schools of thought. So, if you accept the stuff in this book as science let me quote Lavers: (page 56) “McNab’s theory involves a few assumptions, but it is ingenious and at least consistent with the broad pattern of body-size variation known from the fossil record. It has received surprisingly little attention from scientists, however, partly because it is rather complicated but mostly because one year later, in 1979, a radical different theory was proposed that caught the imagination of most researchers in the field and seemed to offer a more general explanation for the evolution of warm-bloodedness in both mammals and birds. “Since when is science based on how much attention and how complicated or how much imagination a theory catches? Then again, on page 101: “The total number of species also declines towards the poles. The reasons for this are complex and not yet fully understood-at least twenty-eight theories have been proposed-but some factors are clear. “Take your pick; get a few to go along with you, now you have a school of thought. But don’t wait too long; there’ll be some more theories shortly. This is more like Archaeology where things are collected, measured, named, classified, catalogued and so forth, but if one expects to get the origin resolved, that will depend on the school of thought in vogue at the time. At least they don’t try to pass it off as science. You can purchase this book at Amazon.