The Mesozoic Era is a geological era that spans from approximately 252 to 66 million years ago. It is often referred to as the "Age of Reptiles" because it was a time when dinosaurs and other reptiles dominated the Earth. The Mesozoic Era is divided into three periods: the Triassic, Jurassic, and Cretaceous periods. In addition to the dominance of dinosaurs, the Mesozoic Era was also a time of significant evolutionary developments, including the emergence of flowering plants, mammals, and birds. Some of the key events that occurred during this time include the breakup of the supercontinent Pangaea, the evolution of new species, and several mass extinctions. The study of the Mesozoic Era provides important insights into the Earth's past climates, environments, and ecosystems.