From Skies to Seafloor: Investigating Potential Extraterrestrial Bases Beneath Earth's Oceans
To the point
Interest in extraterrestrial life now includes the possibility of underwater bases, fueled by reports of fast, precise unidentified underwater craft and historic sightings such as the Barents Sea incident of 1967, Shag Harbor 1967, the 2008 Ubatuba encounters, and the 2004 Tic Tac case, but no conclusive evidence has emerged and researchers continue to investigate.
