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A restoration of Nyasasaurus in its Middle Triassic habitat, based on the known bones and comparisons to closely related forms. The description of Nyasasaurus was one of the year’s most important dinosaur stories. Art by Mark Witton. There’s always something new to learn about dinosaurs. Whether it’s the description of a previously-unknown species or a twist in what we thought we knew about their lives, our understanding of the evolution, biology, and extinction is shifting on a near-daily basis. Even now, paleontologists are pushing new dinosaurs to publication and debating the natural history of these wonderful animals, but the end of the year is as good a time as any to take a brief look back at what we learned in 2012.