Scientists have found signs of ancient oceans on Venus
Scientists from the University of London have discovered new evidence that in the distant past, oceans suitable for life could have existed on Venus. The results of the study were published in the journal on August 5. Phys.org .
The researchers, led by Richard Gale, analyzed the specific features of the planet's terrain, in particular, a network of cracks on low-lying plains. These formations divide the surface into polygons ranging in size from 1 to 2 km. Previously, it was believed that such patterns arose during the cooling of volcanic rock, but Gale's team classified them and found similarities with terrestrial processes.
According to the authors of the work, the structures on Venus resemble cracks that form in sea mud on Earth when clay layers contract and dry out under pressure.
Scientists have drawn a parallel with the Messinian peak of salinity, which occurred on Earth about 6 million years ago. Then the Mediterranean Sea almost completely dried up, leaving behind thick layers of salt and a characteristic cracked landscape.
In addition, experts have reviewed the origin of the long, winding channels on Venus, which were traditionally considered lava. The researchers pointed out their similarity to underwater channels cut by water on the ancient seabed. The wrinkled ridges in the lowlands of the planet may also conceal salt deposits left over from the evaporation of the Venusian oceans.
However, the authors note that the data presented is a hypothesis, not a definitive proof. The volcanic theory of the origin of the relief cannot yet be completely ruled out. To confirm the "marine" version, more detailed observations of the planet's surface will be required. Understanding the mechanisms of ocean loss on Venus, it is claimed, can help astrophysicists in studying exoplanets and their ability to retain water.
On July 24, the journal Nature Geoscience reported signs of tectonic activity on Venus. According to the publication, wide and high uplifts along the edges of the planet's rift valleys may indicate that some of the faults remain active or have stopped moving relatively recently.
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