Scientists have discovered a massive volcano on Mars 3 times larger than any volcano on Earth! Olympus Mons is a shield volcano located in the Tharsis region of Mars, and stands as the tallest mountain and largest volcano in the Solar System. While the volcano is thought to be dormant, new research shows that its interior is still active. By studying seismic waves, scientists have been able to map the interior of the volcano and have found that its magma reservoir is still partially molten and could potentially erupt again. This discovery is providing us with valuable insight into the geology of Mars and the potential for volcanic eruptions on the Red Planet.

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source: Phys.org