The Grand Canyon is one of the most beautiful natural wonders in the world, but that tranquility could be under threat by ...

Researchers have often turned to the Grand Canyon's layers of sedimentary rock to discover pivotal moments in the history of ...

Paleontologists unearthed fossils in the Grand Canyon dating back more than 500 million years that offer a new look into a time when complex life emerged on Earth.

One of the greatest wonders of the natural world, the Grand Canyon is the result of the Colorado River eating away at layers of red sandstone and other rock for millions of years, leaving a gash ...

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

The rock's geochemistry revealed they were a better fit for those in the Grand Canyon, some layers of which date back a mammoth 1.5 billion years.

In the Grand Canyon, for example, a mind-boggling 1.2 billion years of rock are simply missing.

A treasure trove of exceptionally preserved early animals from more than half a billion years ago has been discovered in the ...

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

The Grand Canyon Trust, a group based in Flagstaff that has been critical of the U.S. Bureau of Reclamation's management of the dam, is also calling for more regular high flows.

The original colors are more khaki-toned. The diagonal layers etched across the base of Mount Sharp appear very similar to the sedimentary rock strata of the Grand Canyon.