Deep-Sea Exploration
More people have stood on the Moon than have reached the deepest part of the ocean. The pressure at that depth would an unprotected submarine instantly, and the darkness is absolute. Building a vessel that can such conditions costs as much as a small spacecraft. Yet the rewards are considerable: each expedition species that science has never recorded. Some of these organisms produce compounds that pharmaceutical companies are keen to . There is also a commercial motive, since the seabed metals used in batteries. Environmental groups argue that mining should not begin until we what would be destroyed.