Most modern orders of Insects. Gymnosperms dominated until mid-Cretaceous when flowering plants developed. Mammals appeared, small insectivores. Crocodiles, lizards evolved, similar to modern ones. Dinosaurs radiated Continents low, continental drift begins.
Cretaceous Continents separate, low.
Large inland seas and swamps, warm. Snakes appeared early Flowering plants appeared. Now thought some were warm-blooded, quick and social behaviors. Age of Mammals 65 MYA to now Birds, insects, flowering plants also radiated a. Tertiary Period 63 MYA, Grasslands ecosystem with grazing herbivores, then large carnivores Mammals adapted to locomotion, dental changes with food source, larger brain size Modern bird orders appeared, and song birds. Apes appeared in Miocene, Human-like primates in Pliocene.