# photo | New satellite images of ancient Martian rivers

Modern Mars is an extremely dry and dusty place withlow air temperature. However, judging by the numerous photographs of its surface, once upon a time it was full of various lakes and rivers. This fact was once again proved by the pictures taken by the Mars Express European Space Agency orbiting spacecraft. It clearly shows the traces of an ancient river chain, which crossed the Martian landscape about four million years ago.

Photos taken on the southern highlands of Mars,covered with many craters and an extensive network of valleys. Judging by the relief, the water, which formed all these irregularities, flowed down from north to south (in the pictures - from right to left). The width of these valleys ranges from 200 meters to 2 kilometers: this is especially visible on a topographic map, where the highest points of the relief are marked in red and the lowest or, in this case, the deepest zones in blue.

The relief structure resembles moderndrainage systems. Most likely, river chains were formed during the runoff of excess water from stronger rivers. It is believed that most of this water is simply dried by the influence of solar winds. However, there are other assumptions - for example, water could be absorbed into the surface of the planet.

From this it follows that Mars can stillthere is water, but it is hidden under its shell. Regardless of whether it is in a liquid or frozen state, its reserves can save the lives of future colonists and facilitate their mission.

Mars photos are actively sharing not only ESAand NASA, but also Roscosmos. In early February, the corporation published a panoramic photo of the Martian surface, made on the apparatus Trace Gas Orbiter (TGO). It has a lot of interesting details, telling about the features of the planet in the distant past - you can read about them in our material.

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