Buried dozens of metres under the equator of Mars is a large honeycomb pattern similar to what’s found near Earth’s frigid B poles. Each crevasse spans 70 metres (230 feet) – about half a football field – and is bordered by 30-metre (98-feet) wide slurries of ice and mud. It’s likely that this material is somewhere between 2 billion and 3.5 billion years old. The patterns were spotted in the data sent home by China’s now-incommunicado Zhurong rover, which explored
