Scientists have made a groundbreaking discovery about the Martian surface, revealing dense structures hidden beneath the planet’s northern polar plains. According to Dr. Bart Root of Delft University of Technology, these structures are substantially denser than their surroundings, with a difference of around 300-400 kilograms per cubic meter (19-25 pounds per cubic foot).
The discovery was made possible through gravity-mapping technology, which allows researchers to detect subtle changes in the planet’s speed as satellites pass overhead. The mysterious structures were identified dotting the area surrounding the north polar cap, with one feature resembling a dog.
These findings have significant implications for our understanding of Mars’ history and geology. If the structures are interpreted as impact craters, it would suggest an older crustal age for the northern hemisphere than currently considered. On the other hand, if they are volcanic in origin, it could mean that Mars is still volcanically active.
Additionally, researchers have discovered a weak gravity region surrounding Tharsis Rise, which may be caused by a broad low-density area deep within Mars. This area, measuring 1,600 kilometers (994 miles) across and 350 kilometers (217 miles) thick, could be the result of a gigantic lava plume rising upwards and leaving a relative void behind.
The study’s findings also suggest that Olympus Mons, the largest volcano in the Solar System, may still be growing due to forces deep within Mars. This would be a significant revelation for volcanologists, who have long considered the Red Planet to be geologically inactive.
Source: https://www.iflscience.com/hidden-structures-found-beneath-mars-ancient-ocean-and-largest-mountain-75978