Dinosaurs were groups of organisms that have existed on Earth for a long time. They appeared about 2The late Triassic, 300 million years ago, existed until the end of the Cretaceous period, about 65 million years ago. So, dinosaurs lived on the earth for about 1About 700 million years.
Over this long span of time, dinosaurs have undergone multiple periods and species changes. They thrive on the planet and adapt to a variety of different environments and ecosystems. Dinosaur groups** include a wide variety of species ranging in size, from small ornithopods to giant theropods, as well as flying pterosaurs.
However, the dominance of the dinosaurs was eventually ended by a series of catastrophic events at the end of the Cretaceous period, including a possible massive volcanic eruption and a meteorite that hit the Earth. These events led to large-scale environmental changes, including climate change and ecosystem collapse, which ultimately led to the extinction of the dinosaurs.
Overall, dinosaurs lived on Earth for about 1700 million years old, it is one of the most successful and diverse groups of organisms in the history of the Earth. Their presence has had a profound impact on the evolution and biodiversity of the Earth's ecosystems.