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The ghostly “spiders on Mars” finally explained two decades later



Ziggy was playing guitarand scientists from the UK played with a large piece of dry ice to try to figure out what was behind the strange alien models known as “spiders on Mars. “

These models, visible on satellite images at the South Pole of the Red Planet, are not real spiders, of course; but the branched, black shapes carved into the Martian surface seem ominous enough that researchers have called them “araneforms” (meaning “arachnids”) after discovering the shapes more than two decades ago.


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