Hidden tunnel on Venus? Old Magellan radar points to a giant lava tube
Reprocessed Magellan radar data has revealed a vast hollow lava tube beneath Venus’s Nyx Mons volcano, scientists reported Monday. The cavity measures about 1 km across and at least 375 meters high, marking the first subsurface feature detected on the planet. Researchers say future radar missions could confirm the finding and search for more underground structures.
