Arizona's magnificent Grand Canyon is painstaking result of the Colorado River's current wearing away the planet's surface ...

The lunar canyons Vallis Schrödinger and Vallis Planck are extraordinarily deep, and scientists now know the valleys were ...

The first recorded group to live in the Grand Canyon was the Ancestral Puebloans, who inhabited the land around 2,300 years ago. Spanish explorers stumbled on the Grand Canyon in the 1540s while ...

The man who led a landmark attempt to navigate the entire length of the Grand Canyon did not exactly look ... that may prompt someone to become an explorer. Their research has centered on ...

The Grand Canyon is the biggest canyon on earth ... Three hundred years later, in 1857, an American explorer named Joseph Christmas Ives wrecked his boat trying to ascend the river, but brought ...

A visit to the Grand Canyon is a true bucket list item for anyone on a US road trip. But Arizona isn't the only place where an ambitious explorer can find a Grand Canyon. NASA’s Lunar ...

Highlights of the company's Grand Canyon Explorer Tour include spectacular viewpoints along the South and East rims, visits to Sunset Crater Volcano National Monument, Wupatki National Monument ...

New research reveals that two massive lunar canyons, deeper than the Grand Canyon, were formed in under 10 minutes by intense ...