To me it seems that the warm blooded dinosaurs replaced advanced mammal ancestors that were warm blooded, also.

I also discovered the only complete Brontosaurus skull.

Dinosaurs are the jumper cables to the human mind. Kids can't curb their enthusiasm when they're in a hall of dinosaurs and mammoths and mammoth hunters and trilobites and giant fish that could chomp up a shark. These natural objects in motion and context make kids want to read; you can't stop them from reading and thinking.

Land bridges were everywhere during the extinction, many species were spreading, and there were many diseases.

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.

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.