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feb 8, 66111111 BC - Reign of mammals begins

Description:

All sauropsids except for a few birds die out. These birds radiate extensively throughout the follow era, however.
Small mammals are able to emerge, recolonize, and thrive throughout the cenozoic, displaying a trend towards larger sizes over time.

Added to timeline:

Chordate Evolution over Geologic Time

ByZahur Ashrafuzzaman
26 Jan 2018
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Date:

feb 8, 66111111 BC
Now
~ 5883516 years ago
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