This image from HiRISE (High Resolution Imaging Science Experiment) camera on board the Mars Reconnaissance Orbiter, shows knobs and bluffs that are being actively eroded
Sand behaving at times like a solid, at times a liquid and at times a gas, it is a master shape-shifter. Formed by wind and
The Namib Desert of Namibia and Angola is a land of superlatives. Covering approximately 31,000 sq mi (80,000 sq km), about the area of Austria
Tassili n’Ajjer National Park covers 72,000 square kilometers (27,800 square miles) in southeastern Algeria. Part of the Sahara Desert, the park has a bone-dry climate
Chasma Boreale, a long, flat-floored valley, cuts deep into Mars’ north polar icecap. Its walls rise about 4,600 feet, or 1,400 meters, above the floor.
Nasa's probe sent back photographs from Mars of what appear to be trees on the planet's surface. But it is an optical illusion - they
Sand dunes shaped like blue-black flames lie next to a central hill within an unnamed, 120-kilometer-wide (75-mile-wide) crater in eastern Arabia on Mars.
This observation shows dunes on the floor of the large, degraded Arkhangelsky Crater in the Southern hemisphere of Mars.
This image was taken with a telescope or a microscope? Perhaps this clue will help: if the dark forms were bacteria, they would each span