A meteor may have led to the formation of the Grand Canyon, a new study has found. While many Americans are familiar with the Grand Canyon’s beauty and uniqueness, they may not be aware of the story ...

Long before the Grand Canyon formed, a primitive reptile the size of a baby alligator skittered sideways across the wet sand of an impossibly ancient coastal plain. Then came roughly 315 million years ...

WASHINGTON -- Gazing into the majestic Grand Canyon, awe-struck visitors inevitably ask: "How old is it?"Far older than generally thought, says new evidence that scientists culled from caves lining ...

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