Mark Hay checked his scuba gear one last time, then stepped off a boat and dived toward the seafloor. His destination was Aquarius, the only manned underwater lab in operation in the world.
The metal structure
Mark Hay checked his scuba gear one last time, then stepped off a boat and dived toward the seafloor. His destination was Aquarius, the only manned underwater lab in operation in the world.
The metal structure
