15 août 180000000 av. J.-C. - 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.Ajouté au bande de temps:
Date:
15 août 180000000 av. J.-C.
Maintenaint
~ Il y a 5883516 ans