To me it seems that the warm blooded dinosaurs replaced advanced mammal ancestors that were warm blooded, also.
Robert T. BakkerSince then I have held many jobs at museums in Colorado and Wyoming. I have also taught summer courses at the University of Colorado.
Robert T. BakkerOften extinctions in the ocean occur at the same time as those on land. Then again, the ice age extinctions lost many big animals, but not many sea faring ones.
Robert T. Bakker