The New Dinosaurs Reloaded

== Cretaceous Period ==
*65.5 mya: an asteroid the size of Mt. Everest just barely misses the Earth; had this asteroid struck the Earth, nearly 70% of all life on Earth would have been snuffed out in an instant
== Paleogene Period ==
*55.8 mya: the Paleocene-Eocene Thermal Maximum occurs, resulting in the greatest and fastest increase in global temperature of these entire Cenozoic Era; rain forests are spread across the globe, forcing most animals to shrink in size
*c. 55 mya: pachycephalosaurs (dome-headed dinosaurs) die out completely due to the thermal maximum, and ceratopsids and birds suffer greatly; ceratopsids never recover, but birds return en masse as enenornithes, apsaraviformes, paleognathes, and fowl; tyrannosaurs fall into decline and shrink down to their former Jurassic Period sizes
*c. 55 - 50 mya: India collides with Asia, resulting in a faunal interchange: rahonavid dromaeosaurs invade Laurasia, mostly living in trees; abelisaurs spread out from India and into the main continent