This geologic map provides a detailed look at the area around the Grand Canyon. Lines represent geologic faults and folds. At their core, maps facilitate understanding and exploration. With maps ...

In the afternoon, while his crew set up camp for the night, Powell would often climb into the canyon to investigate. Much has been learned about the geology of the Grand Canyon and about the ...

Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object slammed into the moon 3.8 billion years ago.