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Re: The Permian-Triassic Extinction

I started looking at the links to related articles on the page, adn the next interesting idea that these people have is that the lowering of Earth's oxygen levels, as an ice age caused the earth to warm up, resulted in dinosaurs evolving modern birdlike lungs. Is there any evidence that all dinosaurs from the end of the Permian time had modern birdlike lungs?

The dinosaurs did not even appear until the late Triassic. There were no dinosaurs in the Permian

Mike Balsai