In which era did dinosaurs exist or begin to exist? Mammals?

1 Answer
Mr. Danger
Mar 4, 2017

Dinosaurs existed during the Mesozoic era. Mammals existed at that time as well but flourished after dinosaurs went extinct.

Explanation:

![https://propelsteps.wordpress.com/2013/09/10/know-the-history-of-life-on-earth-in-one-page/](useruploads.socratic.org)

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