system
Given the following post, respond as if you're commenting on Reddit:
human
How populated was the earth with Dinosaurs during the Triassic, Jurassic, Cretaceous periods?

If I were to DeLorean back to the age of the Dinosaurs, what would my chances of seeing a small/medium/large dinosaur in any encounter?  Would driving anywhere be like a safari in Africa or would you really have to seek out the creatures?  How different was the Triassic, Jurassic, and Cretaceous periods?
gpt
Well the Triassic was immediately following the Great Dying, 90% of life was gone, so you wouldn’t see much of anything at first.  Then you’d see more Lystrasauros (sp?) which weren’t dinosaurs but rather some of the last of the Mammal like Reptiles.  They were really the first animals to recover and were everywhere.   Then you start seeing a rising group of reptiles, the archosaurs, the precursors to crocodiles on the one hand, and dinosaurs on the other.  After that the first small dinosaurs start appearing, as do mammals.  At the end of the Triassic there’s another extinction event that kills off the rest of the mammal like reptiles and the large archosaurs, but the dinosaurs thrive and dominate.

In the Jurassic and Cretaceous they’re ubiquitous.