© ESA/DLR/FU (G. Neukum)
Aeons ago, giant volcanoes roiled on Mars. Now quake signals point to ongoing unrest in the underground of the Elysium plane. Is our neighboring world still active?
The mighty volcanoes are a characteristic feature of Mars. In the Tharsis region, named after a biblical land, resides Olympus Mons. It is the largest Martian volcano and is 21.9 kilometers higher than the mean planetary level. The extent of its volcanic shield corresponds to the land area of Poland. It is also one of the highest mountains in the solar system. (Only the planetoid Vesta has a peak 600 meters higher; it was only in the last decade
