A researcher has spotted lava flows shaped like coils of rope near the equator of Mars, the first time such geologic features have been discovered outside of Earth.
The largest Martian lava spiral measured 100 feet across — bigger than any on Earth. It is further evidence that Mars was volcanically active recently — geologically speaking within the past 20 million years.
For more than a decade, scientists debated whether this maze of valleys near the Martian equator was sculpted by ice or volcanic processes.
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