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.