This means Mars rovers have explored "dried up lakebeds and empty river channels". But the data from a NASA mission between ...

Aside from water, another main clue to look for is the presence of organic compounds, which form ... can also be produced by geological sources. We have spotted tantalising glimpses of methane on ...

Ripples are one of the clearest indicators of an ancient standing body of water that can be provided ... of ancient Mars, but it was uncertain if that water ever pooled to form lakes or shallow ...