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Curiosity finds evidence of wet and dry seasons on ancient Mars

www.theregister.com Curiosity finds evidence of wet, dry seasons on ancient Mars

Scientists: Martian mud cracked in a manner that only happens after repeated cycles of drying

The evidence came from photographs snapped by the NASA bot of the dry, dusty Martian surface marked by a series of hexagonal shapes that indicate mud covered the surface before drying and cracking.

The cracks themselves are mere centimetres deep, which the boffins said suggests short wet-dry cycles "were maintained at least episodically in the long term," which would be yet another favorable condition for the past emergence of life on Mars.

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