Thousands of mysterious clay mounds found on Mars were formed by ancient water on the Red Planet's barren northern plains, ...
Buttes and mesas in Mars' Chryse Planitia contain clay minerals made from liquid water interacting with the rock nearly 4 ...
Images of Mars taken from orbit show thousands of mounds in a region sculpted by water billions of years ago. A robotic ...
The car-sized Curiosity rover has spotted evidence of once quite hospitable environs on Mars.
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