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Scientists uncover 15,000 kilometers of lost rivers on Mars

Mars may not have always been the dry and dusty world we imagine. A staggering network of ancient riverbeds, spanning over 15,000 kilometers, has been discovered in the planet’s Noachis Terra region, suggesting that flowing water, fueled by precipitation, was once widespread. Unlike previously studied valley networks, these “inverted channels” reveal a long history of persistent water activity, challenging the idea that Mars was merely cold and dry.

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