Origin of Mammals

200 million years
or 49 meters to today

Geolo­gi­cal era: Meso­zoic / Jurassic

Some early reptile species evolve into mammals. The first mammals are the cloa­cal animals, which have survi­ved to this day (platy­pus). Mammals are more versa­tile than repti­les: they feed their offspring with mammary glands, their fur keeps them warm and their brains are more advan­ced. This makes them parti­cu­larly adap­ta­ble. Howe­ver, dino­saurs rule the world, which is why mammals are only active at night.

The climate is warm, there are no large inland ice sheets. Pangaea breaks up again in Eura­me­rica and the southern major conti­nent of Gond­wana. At the end of the Juras­sic, Gond­wana also breaks up. As alre­ady during the Trias­sic, there is hardly any solid land near the Pole in the Jurassic.

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