How could climate change have caused the cretaceous extinction?

How could a certain asteroid have caused the cretaceous extinction?

How could population size have caused the cretaceous extinction?

How could an asteroid could have caused the cretaceous extinction?

The next era that follows is?

the Cenozoic Era includes what time periods?

describe the Paleogene period.

Describe the Neogene period.

Why might the glaciers have formed?
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