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aug 15, 180000000 BC - Monotremes split from other mammals

Description:

Monotremes give birth externally, laying eggs instead of carrying a child inside a mother's body. They also differ structurally in several regards from other mammals, such as in the digestive and reprotductive systems. With some exceptions, most of these are extinct today.

Added to timeline:

Chordate Evolution over Geologic Time

ByZahur Ashrafuzzaman
26 Jan 2018
2
0
1553

Date:

aug 15, 180000000 BC
Now
~ 5883516 years ago
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