The Sleeping Volcanoes.
Olympus Mons, the largest volcano in the Solar System, rises nearly 22 kilometers high. Though dormant, new research shows traces of underground magma flows—hinting Mars might not be entirely geologically dead.
Echoes of Ancient Rivers.
Once, Mars had huge rivers and lakes fed by a thicker atmosphere. Dried valleys and mineral deposits are fossilized maps of that watery past, shaping NASA’s hope for discovering ancient microbes.
