Though the Grand Canyon we know today is a deep and dusty chasm, it was once an equatorial region bathed in a shallow sea.

The Grand Canyon runs 277 miles along the river, which has been 'carving away rock for the past five to six million years,' the NPS wrote.

Soft-bodied Cambrian fossils found in the Grand Canyon reveals how early animals evolved complex feeding systems over 500 million years ago.

Exceptionally preserved Cambrian fossils uncovered in the Grand Canyon show how evolution accelerated in resource-rich waters ...

The Grand Canyon Lodge welcomed generations of travelers and staffers arriving in the Grand Canyon's North Rim area. It was already rebuilt once, after a kitchen fire in 1932.

The Grand Canyon Lodge in far northern Arizona that was an elusive getaway for nearly a century has been destroyed by a wildfire.

Rocks gathered along the Colorado River contained evidence of a bustling community of animals in an ancient sea.