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The Phoenix team are starting to make ruthless decisions in the name of efficiency, switching off heaters in order to make the best of the dwindling autumn light. It may seem suicidal, but the lander's camera should keep itself warm, while the heaters are a considerable drain on its resources. Ultimately, the only thing it should really need to keep warm are its batteries.
Meanwhile, far to the south, the Mars Rovers are enjoying the seasons changing in the opposite direction. After a dangerous winter of rock-bottom solar power, Opportunity (above) has now crawled back out of Victoria Crater (once expected to be its final resting place) and is now setting off on an epic journey to an even larger crater. Well, epic for a wounded, dust-covered, semi-autonomous robot, anyway.