lava-leaking scar on Mars larger than our own Grand Canyon. Dubbed the Aganippe Fossa, the 373-mile long crack in Mars’ surface, is a graben — a “ditch-like groove with steep walls on either ...

The team says 3D imaging now suggests there had been lava fissures - or cracks - rather ... as we've recently seen in the Central Graben and Viking Graben areas. "As the old saying goes, often ...