It was not an asteroid or comet, because it would have killed everything.
About Robert T. Bakker
Robert Thomas Bakkeris an American paleontologist who helped reshape modern theories about dinosaurs, particularly by adding support to the theory that some dinosaurs were endothermic (warm-blooded). Along with his mentor John Ostrom, Bakker was responsible for initiating the ongoing “dinosaur renaissance” in paleontological studies, beginning with Bakker’s article “Dinosaur Renaissance” in the April 1975 issue of Scientific American.
More quotes from Robert T. Bakker
I also got a chance to go to the American Museum in New York, which helped my interest.
American paleontologist
Land bridges were everywhere during the extinction, many species were spreading, and there were many diseases.
American paleontologist
Since then I have held many jobs at museums in Colorado and Wyoming. I have also taught summer courses at the University of Colorado.
American paleontologist
One researcher just determined that African and Indian elephants make each other sick. When a new animal or plant is introduced to a habitat bad things happen. The biggest danger to native wildlife is foreign wildlife.
American paleontologist
I want to be the Bob DeNiro of the Jurassic.
American paleontologist
The impact of the magazine was very strong. As I said, it portrayed dinosaurs as part of the geological history, part of the story of life on earth. It struck that paleontology was the career for me.
American paleontologist
I also discovered the only complete Brontosaurus skull.
American paleontologist
One of my major goals is to develop a web of the small Wyoming museums and create a major museum system. There are about eight of these museums, and they are all scattered.
American paleontologist
To me it seems that the warm blooded dinosaurs replaced advanced mammal ancestors that were warm blooded, also.
American paleontologist
Stegosaurus was common only on well drained, dry soil.
American paleontologist
As an undergraduate I held many small jobs as an illustrator.
American paleontologist
In 1941 Richard Owen said that the dinosaurs were almost hot blooded.
American paleontologist
Often 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.
American paleontologist
When looking at the evidence of feeding on large prey, you can see every size tooth from hatchling to adult in one spot. The babies may have been fed in the nest until they were full grown, like in eagles and hawks.
American paleontologist
At Harvard I was in charge of the comparative anatomy labs.
American paleontologist
It was not an asteroid or comet, because it would have killed everything.
American paleontologist
Birds evolved from a small raptor like theropod.
American paleontologist
Also, while I was at Yale, I had a job teaching kids at the museum.
American paleontologist
Feathers predate birds.
American paleontologist