The Daily Galaxy on MSN4d
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 ...
Hosted on MSN4mon
'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 ...