dinosaur
I think they became extinct at the end of the Mesozoic era
Mesozoic era
the first type of life form that appeared in the mesozoic era was a fish! the second type of life form that appeared in the mesozoic era was the reptile! and the third was a reptile bird!!!!!!!!!!!!!!!!
mesozoic era (obvious =p)
Pterosaurs
ichthiasaurus
The tyrannosaurus was a reptile. All dinosaurs were reptiles. The word "Dinosaur" means "Terrible Lizard".
The dinosaurs lived in the Mesozoic Era, which includes the Triassic, Jurassic, and Cretaceous periods. The first dinosaurs appeared in the late Triassic and went extinct at the end of the Cretaceous.
Dinosaurs
The Mesozoic era.
Trilobites became extinct about 250 million years ago, in the Mesozoic Era.
Some dinosaurs were in Antarctica in Mesozoic era.