Return of the Sloths

When I first started this blog I was teaching AP Biology at the local high school and used this space as an extension of class discussions and for "bonus" material we didn't have time to talk about. One of those topics was on sloths - in particular their body temperature, enzyme kinetics and evolution. I'm pretty sure none of my former students still read this space - or if they do they remain hidden from view - but I was reminded of them when I read about the extinct, marine sloth, Thalassocnus, over at Catalogue of Organisms.

Pretty cool, for a vertebrate.