The time they lived

The way so far from the beginning of earth

As you see on the chart shown above, dinosaurs lived in the Mesozoic era, about 150 - 250 million years back. First dinosaurs were born in the Triassic era. In the Jurassic era, dinosaurs could be found all over the globe, and in Cretaceous era, due to climatic changes or some other reason, dinosaurs extincted.