To the mining firms vying to extract them, on the other hand, they promise to be a “battery in a rock.”

These nodules, found on the seafloor several kilometers below the surface, are to be the subject of the first submarine mining contract application, whic…

United Nations (United States) (AFP) They might look like pebbles strewn across the seafloor, but to the unique animals of the ocean deep, polymetallic nodules are a crucial habitat. To the mining fi…