Researchers operating China’s Zhurong rover say they have spotted a series of mysterious polygons hidden beneath the planet’s surface, similar to polygons NASA spotted on the surface of Mars in 2012. The newly discovered features, however, were detected more than 35 kilometers beneath the planet’s surface.
While researchers believe that these polygon structures could have formed due to extreme environmental shifts in Mars’ ancient past, their exact nature and formation remain a mystery.
The discovery was initially made during the rover’s one-year mission, which lasted from May 2021 to May 2022, in the Utopia Planitia region. Described by researchers from the Institute of Geology and Geophysics under the Chinese Academy of Sciences as the largest impact crater in the entire solar system, the researchers behind this mysterious find say that Utopia Planitia “has both experienced and recorded variations of the Martian palaeoclimate.”
By using the rover’s ground penetrating radar, researchers scoured a 1.2-kilometer-wide area for various geological features. As a result, 16 mysterious polygons were spotted below a depth of 35 meters, meaning they were likely formed billions of years in the planet’s past.