The Hudson River Estuary is a fascinating and dynamic ecosystem. The combination of tidal mixing, elevation, and geology fosters a wide array of wildlife. But the Hudson didn't always look the way it does today.

During the last Ice Age over 10,000 years ago, the East Coast looked much different, and the river reached over 400 miles farther out into the Atlantic.

The Hudson Canyon is a deep underwater crevasse, the last remnant of the prehistoric river.