230 million years ago.
No. Sharks appeared on earth long before the first dinosaurs did.
Dinosaurs stated to appear 240 million years ago.
Yes because when we are not exist yet dinosaurs rule the earth but today there are no dinosaurs here.
No, dinosaurs are neither a hypothesis nor is there a "hypothesis of Earth".
The duration of When Dinosaurs Ruled the Earth is 1.6 hours.
The Mesozoic Era
Dinosaurs last appeared around 65 million years ago. They are thought to have been wiped out by a giant comet hitting the Earth somewhere around the gulf of New Mexico.
Dinosaurs first appeared in the tertiary stages of the Earth. Tertiary was when the dinosaurs ruled the earth. Then there was jurassic and then creteacious
there are lots, triceratops, t Rex, hadrosaurs and ankylosaurs, they all appeared in the late cretaceous
Mammals did not evolve until dinosaurs were prolific when they did appear they were very small and very scarce when dinosaurs died out.
Dinosaurs