The three geological periods of the Mesozoic Era are further divided into different epochs and stages.
The Mesozoic Era was started after the Permian-Triassic extinction event. The Permian-Triassic extinction event was the largest extinction event in Earth’s history. Over 90% of marine species and 70% of land vertebrates became extinct.
The Mesozoic Era ended after the Cretaceous-Paleogene (K-Pg) extinction event. The Cretaceous-Paleogene (K-Pg) extinction event caused the extinction of the dinosaurs and paved the way for mammals to dominate the planet.
The era before the Mesozoic Era was the Paleozoic Era.
The era after the Mesozoic Era was the Cenozoic Era.
The Mesozoic Era is one of the three eras in the Phanerozoic Eon, and the Phanerozoic Eon is one of four eons on the geological timescale of the planet Earth.
In 1840, British geologist John Phillips proposed the name Mesozoic. The word Mesozoic is derived from the Greek language and means middle life.
In the 19th Century, paleontologist Gideon Mantell coined the phrase Age of Reptiles.