Explore Making North America
Uncovering Layers of the Grand Canyon
North America Sky Tour
North American Gold
A Labyrinth of Lava
Towers of Chalk in Kansas
Mt St Helens: Back From the Dead
How Water Is Reshaping the West
New dams and reservoirs are unmistakably altering the American West’s iconic landscapes.
The Dinosaurs Were Not Alone
Ice Age Death Trap
Scientists race to uncover a site in the Rockies packed with fossil mammoths and other extinct ice age beasts.
The Undamming of America
We’ve impounded rivers for hundreds of years, but as our society has evolved, so has our relationship with dams.
The Volcano Under Yellowstone
Bigger Than T. rex
Meet Spinosaurus—the lost killer of the Cretaceous and the world's largest carnivorous dinosaur ever.
These Boulders are Alive
Formation of the Ancestral Rockies
Inside Glacial Lake Missoula
North American Sky Tour
Pushing the Limits of Life
Time Travel in the Grand Canyon
What does this geological wonder reveal about North America’s deep history?