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jul 26, 177198414 BC - First endothermic synapsids

Description:

Mammalian ancestors begin to evolve what used to be called "warm-bloodedness."

Added to timeline:

Chordate Evolution over Geologic Time

ByZahur Ashrafuzzaman

26 Jan 2018

2

0

1553

Date:

jul 26, 177198414 BC

Now

~ 5883516 years ago

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