global warming and CO2 fluctuation killed the dinosaurs

“Climate instability and the rapid changes in plant life it caused combined to prevent the spread of dinosaurs to tropical regions of the Earth during the Triassic period, a study published by the journal Proceedings of the National Academy of Sciences said….

“Researchers concluded that the fluctuations and high levels of carbon dioxide in the atmosphere may have prevented dinosaurs from spreading to tropical regions by causing unpredictable alterations in the availability of resources.”