90 million years the world is 1 degree colder than 2010, and there are no rain forests with Mediterranean climate replacing them. The savannas and grasslands are more spread, up until the taiga (boreal forests) that start around the height of Canada. Mammals are at their height. An order of neo-mesonychids descended from pigs have overthrown the carnivore baboons. Carnivora is extinct except in South America. Bats have become more dominant, keeping most birds as raptorial-like forms. During this period a mass extinction in between KT and P-Tr arrives, heating up the world and bringing an end to the reign of mammals and the extinction of monotremes.
North America Plains: The center of North America is a huge plain, like today.
