Hidden under the Martian surface has many large craters.

<P> 13, the European Space Agency announced that "Mars Express" probe latest discoveries in the northern lowlands and plains of Mars, buried many of the diameter of 130-470 km between the huge crater, which will help science .community to better understand the geological structure of Mars. .</ P> <P> ESA "Mars Express" probe MARSIS Subsurface Radar pointed out that the person in charge of Picardy, detection results show that the ancient Martian surface than underground, a startling discovery for understanding the formation history of Mars, providing .important information. .</ P> <CENTER> </ CENTER> <CENTER> NASA released October 6 photo shows the surface of Mars Victoria Crater in the picture </ CENTER> <P> </ p>.