Two Grand Canyon-size valleys on the far side of the moon formed within 10 minutes, scientists say
Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object ...
The moon's grand canyons were carved in the blink of an eye
The Earth's Grand Canyon took millions of years to carve, but the moon's grand canyons took about ten minutes.
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Grand Canyon Dragon Map explained
Ryan Crow of the U.S. Geological Survey (USGS) gave a talk to a packed crowd at the Museum of Northern Arizona Jan. 12 ...