Tests on Earth appear to confirm how the Red Planet’s spider-shaped geologic formations are carved by carbon dioxide. Scientists have recreated Martian conditions in a lab to study unique, spider-like geologic features found on Mars,

There is still so much we don’t know about Mars and these Martian spiders which have been imaged on its surface have long been a mystery to astronomers. The wild shapes are made of dust, but how the process by which they formed has long eluded scientists,