ESA’s Mars Express has returned some remarkable new imagery of Tractus Catena area, revealing a series of pit-chains on the flanks of Alba Mons, one of the largest volcanoes in the Solar system. A computer generated perspective view of Tractus Catena created using images from the High-Resolution Stereo Camera on ESA’s Mars Express spacecraft (ESA / DLR / FU Berlin / G. Neukum) Researchers say these features might be tempting targets in the search...