Scientists creating a gravity map of Mars have discovered the presence of mysterious large-scale structures hidden beneath a lost ocean.

Recent research has unveiled massive, hidden structures beneath Mars’ surface, where an ancient ocean is believed to have once existed.

To uncover the hidden features, researchers employed a sophisticated technique that measures minute changes in the orbits of satellites around Mars. The tiny deviations result from variations in the planet’s gravity field, which are influenced by the distribution of mass beneath the surface, Study Finds reports.

The findings revealed that the the Martian mantle's active processes may be fueling the growth of Olympus Mons, the largest volcano in the solar system.

Studies on Mars have revealed hidden structures and dense areas beneath old ocean beds, influencing the volcanic activity of Olympus Mons. Using gravity data and new insights from NASA’s InSight mission,

Scientists at NASA's Jet Propulsion Laboratory have recreated spider-like araneiform terrain, a geologic formation found on Mars, in a lab on Earth.

The research team uncovered a vast, lightweight structure approximately 1,750 kilometres wide and located 1,100 kilometres beneath the surface, forcing the Tharsis region to expand upward.