Strange 90-Million-Year-Old Dinosaur Fossil Rewrites History

A newly described Patagonian fossil reveals the evolutionary origins and global spread of the tiny alvarezsaur dinosaurs. Researchers led by University of Minnesota Twin Cities paleontologist Peter Makovicky and Argentine scientist Sebastian Apesteguía have identified a 90-million-year-old fossil that fills an important gap in the history of this unusual dinosaur group. Their findings, published in [...]