Every spring at polar dunes of Mars have black streaks caused the formation of which may be liquid water near the surface. This assumption is able to give a new round of searches for signs of life on the red planet.
Dark streaks of sand a few meters wide slide on the slopes at a speed of about one meter per day. They form the branching pattern on the surface, and a feeling that these bands represent a certain liquid substance.
Scientists believe that the stripes appear when the molecules in the surface layer of molecules of water attracted to the surface of a mineral. A computer model developed by researchers, suggests that this process of "lubricates" the surface of soil particles, which leads to slide the dunes.
According to Matt Balma (Matt Balme) from the British Open University in Milton Keynes (UK’s Open University in Milton Keynes), the possible presence of liquid water beneath the surface - a very interesting theory, especially in light of the latest results of the search for signs of life on Mars. We’ll tell you the top news of science and technology, more detailed and interesting.