Scientists analysing NASA’s Magellan radar data have identified signs of a vast underground lava tunnel on Venus. If confirmed, it would be only the second such structure found on the planet, challenging the belief that Venus is geologically inactive and opening new possibilities for studying its volcanic past.​Scientists analysing NASA’s Magellan radar data have identified signs of a vast underground lava tunnel on Venus. If confirmed, it would be only the second such structure found on the planet, challenging the belief that Venus is geologically inactive and opening new possibilities for studying its volcanic past.  ​ entertainment