WASHINGTON, Feb 4 (Reuters) - The Grand Canyon in Arizona is one of ... in diameter, larger than the asteroid that struck Earth 66 million years ago and doomed the dinosaurs.

New research shows that when an asteroid slammed into the moon billions ... digging out two canyons comparable in size to ...

“Nearly four billion years ago, an asteroid or comet flew over the lunar ... to erode the landscape of Arizona to create the Grand Canyon. The celestial object that plowed into the moon likely ...

Spanning 25 miles in diameter, this crater is three times the size of the Grand Canyon, making it the largest known impact site in the U.S. and the 15th largest on Earth. The asteroid’s ...

New research shows that when an asteroid slammed into the moon billions ... digging out two canyons comparable in size to Arizona's Grand Canyon in barely 10 minutes. The latter, by comparison ...

Asteroid Impact on Moon Blasted Two Grand Canyons in 10 Minutes By Will Dunham WASHINGTON (Reuters) - The Grand Canyon in Arizona is one of Earth's natural wonders, carved out over millions of ...

How an Ancient Asteroid Strike Carved Out 2 Grand Canyons ... digging out two canyons comparable in size to Arizona's Grand Canyon in barely 10 minutes. The latter, by comparison, took millions ...