![](http://www.ecns.cn/hd/2022/09/27/34a86cd55bb34b6b9f87e43a01724a4a.jpg)
A scientist at the Institute of Geology and Geophysics of the Chinese Academy of Sciences, explains Zhurong rover's findings at a press conference, Sept. 26, 2022. (Photo: China News Service/Sun Zifa)
Research shows that the subsurface layer may be shaped by major flooding that took place around 3.2 to 3.5 billion years ago in the Utopia Planitia on Mars.
![](http://www.ecns.cn/hd/2022/09/27/8e68354efb9b408db66cc3bea6335afa.jpg)
Conceptual model of the ancient resurfacing of southern Utopia Planitia of Mars. (Photo provided to China News Service)