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Dinosaur Extinction, what caused it ? Contrast tow Hypotheses

There are two main hypotheses about dinosaur extinction
The “intrinsic gradualists”

The “extrinsic catastrophists”
Read these two links and  decide what hypothesis you agree more
https://ucmp.berkeley.edu/diapsids/extinctheory.html

https://newscenter.lbl.gov/2010/03/09/alvarez-theory-on-dinosau

Discussion board 4
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