Mesozoic

The Mesozoic Era is a period of Geological time from approximately 250 - 65 million years ago. This era began in the end of the Permian-Triassic extinction event, and ended with the Cretaceous-Paleogene extinction event. It is known as the Age of Reptiles because they were the dominant land, sea and sky invertabrates of that time.

The name 'Mesozoic' means " Middle life". It is one of the three geological era's of the Phanerozoic eon (The other two being the Paleozoic era and the Cenozoic era). The Mesozoic era is sub-divided into three periods; the Triassic period, the Jurassic period and the Cretaceous period.

Geological periods
The Mesazoic era started after the Paleozoic era and lasted for about 180 million years, from 251 - 65 million years ago. This time is split up into three geological periods. From the oldest to the youngest;
 * Triassic period (251 - 199 Mya)
 * Jurassic period (199 - 145 Mya)
 * Cretaceous period (145 - 65 Mya)