The Mesozoic Era began 251 MYA and ended 65.5 MYA and it is also known as the age of the reptiles. The climate was warm with no evidence of glaciers. The location of the continents in the Mesozoic Era looked like this.
As you can see Pangea moved and broke apart.
Animals in this era included Triceratops, Stegosaurus and the mighty T-Rex. Ferns, trees, and moss were just some of the plant life alive at the era.