Spectacular satellite images suggest that Mars was warm enough to sustain lakes three billion years ago, a period that was previously thought to be too cold and arid to sustain water on the surface. The research, by a team from Imperial College London and University College London, suggests that Mars had lakes made of melted ice along parts of the equator.
Researchers analysed the images from the Mars Reconnaissance Orbiter and discovered a series of small sinuous channels that connected them together. The researchers say these channels could only be formed by running water, and not by ice turning directly into gas.
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