Looking up at the moon in the night sky, it’s difficult to grasp just how dramatic the topography of its surface really is.
Two such lunar canyons, Vallis Schrödinger and Vallis Planck, stretch over 270 km (168 miles) each, with depths of 2.7 km ...
Two of Moon's Grand Canyons Were Created in Just 10 Minutes Due to a Powerful Impact 3.8 Billion Years Ago, Claim Researchers ...