Interesting sand waves were found on Mars by the Curiosity droid. Experts from NASA believe that the ocean could have been present on the Red Planet millions of years ago.
The sand waves that interested NASA specialists are very similar to those of the earth in deserts. They have been preserved very clearly and formed under the influence of unknown factors. Many space explorers are extremely pleased with such a find, since there are some theories of the life cycle of the Red Planet, which can be proved or disproved thanks to this find.
Some scientists believe such a picture indicates that water was present on Mars many millions of years ago. The animals that were in the ocean died out or moved into the bowels of the planet, and the reservoir itself disappeared for unknown reasons. Other experts claim volcanic activity. In this case, the formation of waves took place purely due to geological features, while water has nothing to do with it.
Evgeniya Shtol