Glyptodons

Ok, part of this is just that I really like the word "Glyptodon" and am trying to find more uses for it ;-). But there is a point here, I'm pretty sure. A while back I was teaching a class, and the gentleman teaching before me, an Algonquin Native Descendent, who was talking about the history of the ways that waterways in the Northern US had impacted patterns of settlement and development, became quite passionate at the sight of Eric's t-shirt, which had an mastodon on it. The gentleman launched into a staunch defense of his ancestors, who for a long time were typically considered to be…