Before humans built dams, beavers did. For 24 million years, they shaped the waterways of the northern hemisphere — slowing rivers, raising water tables, building the wetland infrastructure that held the continent together.

Then the fur trade arrived, and within two centuries, most of them were gone. So were the wetlands, the groundwater, and the floods that had nowhere left to go.

In this episode, we explore the deep history of the North American and Eurasian beaver, the centuries of removal that followed, and why researchers and governments are now looking to reintroduction as a serious tool against drought and wildfire.

The blueprint was always there. We just stopped reading it.