Paul Olsen
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You Asked: Dinosaurs Survived When CO2 Was Extremely High. Why Can’t Humans?
Our expert says: Although carbon dioxide levels have been much higher in the past, they generally increased slowly, giving plants and animals time to adapt. When the rate of climate change was staggeringly fast, like today, there were big problems.
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Dinosaurs Took Over Amid Ice, Not Warmth, Says a New Study of Ancient Mass Extinction
There is new evidence that ancient high latitudes, to which early dinosaurs were largely relegated, regularly froze over, and that the creatures adapted—an apparent key to their later dominance.
During COP30—the 2025 UN Climate Change Conference taking place November 10–21 in Belém, Brazil—experts from Columbia Climate School and Columbia University will be contributing to key events, sharing insights, and helping shape the dialogue toward ambitious, science-based solutions. Learn More
