All across the Arctic, frozen soil is thawing out. A lot of stuff is buried there -- plants and animals that lived more than 10,000 years ago. What happens when a Paleolithic bison bone starts to decompose for the first time? And what does that have to do with climate change? Find out more at www.thresholdpodcast.org. Our reporting is made possible by listeners like you. Become part of our passionate network of supporters at https://www.patreon.com/thresholdpodcast. This season is underwritten by the Pulitzer Center on Crisis Reporting. Production partners: Montana Public Radio and PRI’s The World.

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