The car-sized Curiosity rover has spotted evidence of once quite hospitable environs on Mars.

"The shape of the ripples unequivocally indicates the presence of water in lakes that was subjected to wind influence".

NASA's Curiosity rover finds 3.7-billion-year-old wave ripples on Mars, evidence of shallow lakes and a once-warm climate, ...

"The research highlights the alarming role of water consumption for feeding livestock in driving the lake's rapid depletion," said co-author William Ripple, distinguished professor of ecology at ...