The overwhelming impression I get from surveying internal anatomy is that it is a beautifully honed mess! Every organ and structure has a function, but this has evolved gradually and sometimes imperfectly, with vestigial weaknesses reflecting the unimaginably long journey of the animal’s DNA through geological deep time. From sea to land, from deserts to jungles, from shredding leaves to slaughtering wildebeest, the anatomies of animals tell us not only what they do now, but what their ancestors did in the past.
