An image of two Martian craters surrounded by light and dark terrain.

The largest impact basin in the Solar System is known as Utopia.

It is roughly the distance from London, England to Alexandria, Egypt. The geological features are located in Utopia Planitia, a massive lava plain that is now rich with ice. China's Zhurong rover spent its time driving around the vast plain and taking selfies while it was in Utopia Planitia, which is1-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-65561-6556

Oblique perspective view of Utopia Planitia, taken by the Mars Express Orbiter.

The two craters on the lava plain were captured by the High Resolution Stereo Camera. The topographical image, below, was created from data collected by the orbiter in July but only recently produced and shared with the public. On either side of the craters are flat surfaces called mantled deposits, which are layers of dust and ice that probably originated from ancient Martian snows.

A topographical image of the Martian surface.

One of the craters has a resemblance to the ridges of the human brain. You can see the ridges undulating within the crater if you look closely.

A cropped view of the brain terrain.

One leading theory is that the terrain comes from buried water that weakens the Martian surface and gives it a rippled look. It's hard to say how the geological feature forms from Mars, but some brain terrain on Earth may offer clues.

The dark material in the Mars Express images is related to the cracked ground on the planet.

Mars is a wasteland of carbon dioxide, dust, and ice, just like a desert. The more we land on the planet, the more we can understand the geological and hydrological process of the Red Planet.

The Perseverance rover has noticed some interesting details about how Jezero Crater took shape over millions of years, and the planned ExoMars Rosalind Franklin rover is supposed to dig into the Martian soil.

With more boots and wheels on the ground, we may be able to figure out what causes brain terrain.

NASA and the European Space Agency changed their plans for a Mars sample return mission.