65 million years
or 16 meters to today
Geological era: Cenozoic / Palaeogene
At the end of the Cretaceous period a cosmic catastrophe occurred. A meteorite smashed into Central America and, probably due to continental drift, enormous volcanic eruptions occur in India (Deccan-Trapp). This is followed by a dramatic drop in temperature with continental icing and a drop in sea level. In the sixth mass extinction triggered by this, the dinosaurs disappear — with the exception of the birds. The versatile mammals conquer the entire planet.
The climate is about 4 °C warmer than today, i.e. subtropical. The sea level is much higher than today, as are the oxygen and CO2 content of the air. The flora and fauna spread over a new land bridge between Africa and Eurasia. In Australia, animals and plants develop completely differently.