Researchers have found a link between two geological events in iconic locations of the U.S. Southwest that scientists ...

A new study suggests ancient wood floated into a cave far above the Colorado River when a meteorite-induced earthquake ...

LOS ANGELES — The awe-inspiring Grand Canyon was probably carved about 70 million years ago, much earlier than thought, a provocative new study suggests — so early that dinosaurs might ...

The awe-inspiring Grand Canyon was probably carved about 70 million years ago, much earlier than thought, and so early that dinosaurs might have roamed near this natural wonder, a provocative ...

LOS ANGELES (AP) — The awe-inspiring Grand Canyon was probably carved about 70 million years ago, much earlier than thought, a provocative new study suggests — so early that dinosaurs might ...

The May issue of the Geological Society of America Bulletin indicates that the Grand Canyon formed about 55 million years ago.

Grand Canyon Painted Desert See more records from this collection Division of Vertebrate Paleontology records, circa 1947-1974 and undated See more records associated with this person National Museum ...

A new study pegs the age of the Grand Canyon at 70 million years, much higher than most other estimates. Some scientists, though, aren't convinced by the latest data.

LOS ANGELES — The awe-inspiring Grand Canyon was probably carved about 70 million years ago, much earlier than thought, a provocative new study suggests — so early that dinosaurs might have ...

LOS ANGELES — The awe-inspiring Grand Canyon was probably carved about 70 million years ago, much earlier than thought, a provocative new study suggests — so early that dinosaurs might ...