The Daily Galaxy on MSN3d
Two Massive Lunar Canyons Appeared In Minutes
Scientists scanning the Moon’s lunar rugged surface have made an unexpected discovery—two enormous canyons, each plunging 2.2 ...
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'Lost in insignificance': Here's what it's like to rappel into the solar system's largest canyon
This excerpt from the new book "Daydreaming in the Solar System" by John ... the Earth's Grand Canyon is a mere 29 km (18 miles) wide and only about 2 km (1 mile) deep, extending for less than ...