The (strange and unusual) sloths of the fossil record - cave divers & giants bigger than elephants 

Early members of the superorder Xenartha...with one of the best names in paleontology!
The evolution and family tree of the sloths, some famous species, and how they came to be the subject of the first paleontological paper in the United States! (OK, Jefferson thought it was a lion at first, but still...)

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