The End of Dinosaurs

The Cretaceous Extinction

How many species of dinosaurs were living at the end of the Cretaceous period?

No one knows the exact number of dinosaur species living before the end of the Cretaceous period, as we do not have a complete dinosaur fossil record. The nature of fossilization—or that not all animals were in the right place at the right time in order to become a fossil—and the process of erosion have wiped away much of the evidence over time. Although scientists know there were probably many more dinosaurs, only a few species were still alive toward the end of the Cretaceous period, and most of them lived on the North American continent.


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