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*Triassic–Jurassic extinction - Between 199 to 214 million years ago many species became '''extinct''' due to a number of events including climate change. This [[extinction]] led to the dominance of dinosaurs.
*Cretaceous–Paleogene extinction - 66 million years ago 76% of life on [[Earth]] was made '''extinct''' due to an [[asteroid]] impact on [[Earth]]. This [[extinction]] led to the end of dinosaurs and the dominance of [[mammal]]s.
* ... Some scientists believe we are in the middle of another [[Mass Extinction|mass extinction]] caused by [[human]]s because around 200 [[species]] are going [['''extinct]] ''' every day.