The tallest cliff in the solar system is so extreme that even imagining standing on its edge is enough to make your stomach ...

This vertical cliff consists of soft mud deposited on the Japan Trench bottom and was uplifted ~60 m by the 2011 megaquake. This was the first time that the fault scarp of a trench-type earthquake was ...

This enhanced color image (using the red-green-blue filter) shows a group of lovely barchan dunes along a scarp (cliff) in Chasma Boreale in the North Pole of Mars. Our primary goal is to track for ...

Anyone who stood on a rock ledge a few hundred feet above an ocean-swept river delta could have watched for walruses or whales among the icebergs and searched for woolly mammoths tracking across the ...