Earth’s tallest mountains are impressive by human standards, but they are modest compared with the largest volcano in the ...

Mars is home to the tallest volcano in the solar system, a colossal mountain called Olympus Mons that dwarfs anything on ...

Young Mars would have been a staggering place to explore. The Red Planet was covered in flowing rivers of both water and lava. At the time, a series of four volcanoes — Olympus Mons and the three ...

Learn how a young volcano on Mars stayed active for nine million years and what its changing lava reveals about Mars’ interior. Mars may look frozen and silent today, but near Pavonis Mons — a volcano ...