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Pratigya Polissar Sees Landscapes Changing Through a Microscope

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The word fossils typically conjures images of T-Rexes and trilobites. Pratigya Polissar thinks micro: A paleoclimatologist, he digs into old sediments and studies molecular fossils—the microscopic remains of plants and animals that can tell us a lot about what was living in a particular time period. His work has helped uncover the shifting pattern of the East Asian monsoon and its possible impacts on early Chinese societies, and the past record of drier times in America’s Pacific Northwest. And by looking back to what was thriving during a very warm period long ago, he’s looking into our future, as well.

In the latest in our video series about Earth Institute researchers, Polissar, Lamont associate research professor at the Lamont-Doherty Earth Observatory, talks about his work, and what inspired him to go into his field. See more in the series here.

Video production by the Columbia News video team.

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Collage of Turkiye beach scene and Columbia University Campus with text: UN Climate Change Conference COP31, Antalya, Turkiye, Nov 9-20, 2026

COP31, the 2026 United Nations Climate Change Conference, aims to advance dialogue, strengthen consensus, and accelerate climate action on a global scale. From November 9–20, 2026 in Antalya, Türkiye, heads of state, ministers, scientists, business leaders, and civil society will gather to advance efforts in emission targets, climate finance, and adaptation and resilience. Once again, our experts, students, and global thought leaders from Columbia Climate School and across Columbia University are contributing to key events, sharing insights, and helping shape the dialogue toward ambitious, science-based solutions. Learn More

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