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Submission + - Huge Spirals Found on Mars—Evidence of New Lava Type? (nationalgeographic.com)

fishmike writes: "Hundreds of large spirals have been discovered on Mars, and scientists think the coiled features are evidence of a type of lava flow never before seen on the red planet.

If so, the spirals would suggest that volcanoes—not ice floes, as other experts believe—shaped an unusual area near the red planet's equator."

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Huge Spirals Found on Mars—Evidence of New Lava Type?

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