Much different than they are today.
precambrian era
Mesozoic Era
Ultrasaurus
there were no dinosaurs
Mesozoic Era
The first stage in dinosaur times (the Mesozoic Era) was the Triassic.
Carnotaurus lived in the Cretaceous period of the Mesozoic era.
dinosaur
The Mesozoic
there were no humans
In the Mesozoic era
The Mesozoic