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A review of old Mars Odyssey data has revealed the presence on Mars of water ice near the planet’s equator.
The article makes a big deal about the importance of this discovery for the possibility of past or even present life on Mars. I say that its real importance relates to future colonists, and cannot be understated.
I should add one caveat: The resolution of the data is not great, 290 kilometers, which leaves a lot of room for error.