>>21178584Sweatie, the earth was a lot warmer and greener during the time of dinosaurs, so they had unlimited supply of food because most of the land was rich in vegetation from a warm, wet climate. And as they grew bigger it pretty much turned into an arms race of size for the herbivore and carnivore dinosaurs, until they hit the upper limit. And they could do that because dinosaurs lived for nearly 200 million years uninterrupted by any mass extinctions.
