The creepy ‘spiders on Mars’ finally explained after two decades

Ziggy played the guitar, and UK scientists played with a large chunk of dry ice to try to figure out what’s behind the strange alien patterns known as “spiders on mars. “

Those patterns, visible in satellite images of the South Pole of the Red Planet, are not real spiders, of course; But the black, branching shapes carved into the Martian surface look creepy enough that researchers named them “araneiformes” (meaning “spider-shaped”) after discovering the shapes more than two decades ago.

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