Nobody knows how these mysterious ridges formed on the surface of Mars

Planetary scientists studying photos of Mars's ever-changing landscape have discovered a stunning formation of bedrock ridges near the planet's equator, inside Schiaparelli Crater – but how they formed remains a mystery. » 9/17/13 1:20pm 9/17/13 1:20pm

Anakin Skywalker's hometown is about to be overtaken by sand dunes

If you build your home in the middle of a dune field, you're gonna have a bad time. Consider the buildings of Mos Espa (the Tatooinian city featured in The Phantom Menace), which are about to be buried by a hill of sand advancing steadily across the Tunisian desert. » 7/22/13 8:00am 7/22/13 8:00am