there were no humans
Some kind of a mating signal during the dinosaur era.
There were three periods during the mesozoic era; the Triassic, Jurassic and Cretaceous.
Science progressed rapidly during this time.
A dinosaur is a type of reptile that lived during the Mesozoic Era, which is divided into three periods: the Triassic, Jurassic, and Cretaceous. This era spanned from approximately 252 to 66 million years ago, during which dinosaurs thrived and diversified into various species. They are characterized by their unique skeletal structures and adaptations that allowed them to inhabit a wide range of environments. The Mesozoic Era ended with a mass extinction event that led to the demise of most dinosaur species.
Ultrasaurus
there were no dinosaurs
All non-avian dinosaurs lived during the Mesozoic era. Every dinosaur you can think of, from Tyrannosaurus rex, Triceratops, and Ankylosaurus to Stegosaurus, Apatosaurus, and Velociraptor, lived during the Mesozoic era. Many birds, however, which are a subgroup of dinosaurs, lived after the Mesozoic era.
Dinosaurs lived during the Mesozoic era. There were three periods, the Triassic, Jurassic, and Cretaceous.
The first stage in dinosaur times (the Mesozoic Era) was the Triassic.
Dinosaurs first appeared around 230 million years ago, during the Triassic period. This was part of the Mesozoic era, which covered almost all of dinosaur existence.
Carnotaurus lived in the Cretaceous period of the Mesozoic era.
In the Mesozoic era