Robert T. Bakker
In 1964, John Ostrom led an expedition that included his student Robert T. Bakker into the south-central part of Montana. The rocks they prospected were of the Cloverly Formation, dating back to the Early Cretaceous. Among their finds were the first documented remains of a small carnivorous dinosaur that would be named "Deinonychus antirrhopus". This discovery helped ignite the Dinosaur Renaissance. It exhibited important anatomical similarities to birds that helped scientists shed antiquated ideas interpreting dinosaurs as "overgrown lizards".