Finding old-growth trees that haven’t been disturbed by human activity often requires hiking, kayaking and camping out for days. The only way into Wrangell St. Elias National Park and Preserve in Alaska was by air. The team had to fly in one by one to take samples along the tree line. Photo by Nicole Davi
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AGU25, the premier Earth and space science conference, takes place December 15-19, 2025 in New Orleans, Louisiana. This year’s theme—Where Science Connects Us—puts in focus how science depends on connection, from the lab to the field to the ballot box. Once again, Lamont-Doherty Earth Observatory and Columbia Climate School scientists, experts, students, and educators are playing an active role, sharing our research and helping shape the future of our planet. #AGU25 Learn More