'Saber-toothed squirrel': First known mammalian skull from Late Cretaceous in South America
Wednesday, November 2, 2011 - 19:32
in Paleontology & Archaeology
Paleontologists have discovered two skulls from the first known mammal of the early Late Cretaceous period of South America. The fossils break a roughly 60 million-year gap in the currently known mammalian record of the continent and provide new clues on the early evolution of mammals.