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OpenStudy (anonymous):

what would be a hypothesis on how the mesozic era ended??

OpenStudy (anonymous):

A mass extinction particularly Cretaccious-Teriary (KT event) ended the mesozoic era. It is not clear what actually happened but the hypothesis are due to an asteroid/bollide impact, a giant volcanic eruption or a catastrophe.

OpenStudy (tanya123):

@jamclementine is correct !

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