For decades now, scientists have been looking for, and finding, evidence of water on Mars. Some might remember that Dan Quayle even said, "We have seen pictures where there are canals, we believe, and water." Quayle wasn't exactly right about the surface of Mars, but it does appear that liquid water exists on Mars during Martian summers. The liquid water on Mars wouldn't look familiar to most people, though, as it's only a liquid brine that flows when it's just above -23 °C. However, there could be more liquid water somewhere that we haven't seen yet -- and that might make Mars more hospitable to life as we know it.
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