Broadcast Outage: We're investigating a broadcast transmission failure affecting the San Luis Valley from Antonito in the south to Salida in the north. We're working to resolve this issue. You can stream our live broadcast HERE or via the RMPBS+ App.

Stream live and on-demand content now on our new app:
RMPBS+

Help tell more stories in 2026 - make a year-end gift!

Give Now
go back to Shows
Great Natural Monuments - Grand Canyon show's poster
Science and Nature

Great Natural Monuments - Grand Canyon

Passionate geologists Karl Karlstrom and Laura Crossey take a fascinating journey along the Colorado River to discover the natural monument that is still far from having revealed all its secrets. They cross the wildest rapids brought about by the clash between the Colorado River and the most ancient rocks of the Grand Canyon. And they solve the enigma of its formation, debated for 150 years.

1 Season · 2 Episodes

Latest episode

RMPBS Passport

Please log in to your PBS Passport account to watch this video

Become a Member

Episode #102

Season 1 Episode 102 | 52m 43s | CC

After four days of navigating the Grand Canyon, Karl and Laura arrive at the places that tell the story of the formation of the American continent and elucidate the incredible moment when the Earth was a giant snowball. They cross the wildest rapids brought about by the clash between the Colorado River and the ancient rocks of the Grand Canyon. And they solve the enigma of its formation.

Distributed nationally by American Public Television

Subscribe to Our Newsletters

Get trusted Colorado stories, programs, and events from Rocky Mountain PBS straight to your inbox.

Set Your Preferences >