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jan 3, 140000000 BC - Placentals and marsupials split

Description:

The remaining mammals split into Metatheria and Eutheria, which derive into marsupials and placentals respectively. Both carry their young internally for a significant period of time. the former carry them in a pouch after some internal development, and the latter feature almost total internal development.

Added to timeline:

Chordate Evolution over Geologic Time

ByZahur Ashrafuzzaman
26 Jan 2018
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Date:

jan 3, 140000000 BC
Now
~ 5883516 years ago
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