It has often been said that we know more about the surface of the Moon than we do about the world’s seas and oceans.
The study of USOs (Unidentified Submersible Objects) is a case in point.
Many of the reports lie in the USO files of the Soviet and Russian Navy and remain secret however some have filtered out.
In their new book authors Paul Stonehill and Philip Mantle reveal stories of strange encounters by the Soviet and Russian Navy with unexplained objects.
Watch video below: