What era did dinosaurs dominated earth?

Dinosaurs dominated the Earth during the Mesozoic Era, which lasted from approximately 252 to 66 million years ago. This era is divided into three periods: the Triassic, Jurassic, and Cretaceous. Dinosaurs thrived during these periods, particularly in the Jurassic and Cretaceous, until their extinction at the end of the Cretaceous period, likely due to a combination of volcanic activity and an asteroid impact.