The Evolution of the Mammals After the Extinction

Post triassic, the dinosaurs all this diversity diversification. But do they also spread to all corners of the world at that time? So i'll back up slightly. There were early members of the marsupial and placental lines. They weren't the modern types, but they were ancestors. And in fact, there were quite a lot of these early marsupial animals,. especially living in north america and in europe and in asia. The extinction almost complete wiped them out. It wasn't too long after that, they were just extinguished on the northern continents. And they won a reprieve by going south and migrating to south america, then eventually to australia