Dubbed "araneiform terrain," the Mars surface formations span over a half-mile long and have hundreds of branches that resemble spider legs, according to NASA.

Scientists at NASA's Jet Propulsion Laboratory have recreated spider-like araneiform terrain, a geologic formation found on Mars, in a lab on Earth.

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,