Dinosaurs
The history of the Dinosauria begins with one of the dinosaur's small extinct ancestors called Petrolacosaurus. Around 270 million years ago, this animal was a member of the group of ...
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Asteriods, Dinosaurs, and Geology: Catastrophic Events and the Theory of Mass Extinction
Overview
Fossils were first determined to be the remains of extinct animals in the nineteenth century. This rea...
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Were Dinosaurs Hot-Blooded Animals?
Viewpoint: Yes, the most recent fossil evidence indicates that at least some dinosaurs were hot-blooded animals.
Viewpoint: No, the long-standing view of dinosaurs ...
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Dinosaurs
Asteriods, Dinosaurs, and Geology: Catastrophic Events and the Theory of Mass Extinction