Flowing lava can carve or build paths very much like the riverbeds and canyons etched by water, and this probably explains at least one of the meandering channels on the surface of Mars. These results ...

The Gediz Vallis channel is visible above the rocky area in the foreground. Mars is a dry and dusty planet these days, but it wasn’t always like that. NASA’s Mars rovers are getting an up close and ...

Mars is now a cold, dry desert, but robotic satellites and rovers have returned new evidence of a warmer and wetter climate more than 3.5 billion years ago, when conditions may have been more ...

LOS ANGELES — The surface of Mars is dotted with a maze of channels, suggesting the possibility of ancient megafloods. Now scientists peering below the surface have uncovered the first evidence of ...

Diagram highlighting areas of presumed lava channels on Mars Details from the Ascraeus channel (red), meandering across the surface of Mars. The insets in the black boxes show close-ups of some of the ...