The problem with drawing these kinds of conclusions is that it's easy to invent adaptive stories that purport to explain changes in morphological features, but not easy to build a case that will convince an appropriately sceptical audience.
I've heard of over a dozen disparate adaptive explanations for why zebras have stripes or why human hair is less dense than that of other mammals, but none are necessarily correct.
I've heard of over a dozen disparate adaptive explanations for why zebras have stripes or why human hair is less dense than that of other mammals, but none are necessarily correct.