Extraterrestrial Civilizations Living Underwater Are Safer
https://www.bibliotecapleyades.net/vida_alien/alien_extraterrestrialcivilizations17.htm
SwRI RESEARCHER THEORIZES WORLDS WITH UNDERGROUND OCEANS MAY BE MORE CONDUCIVE TO LIFE THAN WORLDS WITH SURFACE OCEANS LIKE EARTH
https://www.swri.org/press-release/swri-researcher-theorizes-worlds-underground-oceans