. About 3.8 billion years ago, it’s believed that two large canyons were likely carved into the surface of the moon over a period of … Two Grand Canyon-size valleys on the far side of the moon formed within 10 minutes, scientists sayRead more
. About 3.8 billion years ago, it’s believed that two large canyons were likely carved into the surface of the moon over a period of … Two Grand Canyon-size valleys on the far side of the moon formed within 10 minutes, scientists sayRead more