D is for Doedicurus, one of those armored glyptodont tanks from the Pleistocene some 2.8 million to 11.7 thousand years ago and might have managed to make it into the current Holocene to about 8000 to 7000 years ago.
To be fair, it's part of a long tradition that predates humanity. When the Panama isthmus was established 3 million years ago, a good many animal species in South America went extinct in a relatively short amount of time in the resulting Great American Interchange. In fact, this sort of thing has happened throughout geologic time whenever two formerly separated groups of animals get a means to intermingle. Like it or not, species going extinct, while saddening and tragic, is a part of evolution, although I agree that humans haven't helped matters.
One thing that can be said for humans, though: we're the only species that cares.
To be fair, it's part of a long tradition that predates humanity. When the Panama isthmus was estab
