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Is Water Discovered on Mars Evidence of Extraterrestrial Life?
Catch up with NBC News Clone on today's hot topic: Mmvo42935365966 - Breaking News | NBC News Clone. Our editorial team reformatted this story for clarity and speed.
For years scientists knew there was some water on Mars, but it was frozen solid in polar ice caps. Now streaks snaking down the planet’s mountains suggest water in a liquid form exists.
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