In the cold, lightless Pacific Ocean deep, the seabed is scattered with metal-rich rocks coveted by miners—and huge numbers ...

This continental slope plunges into depths sunlight cannot reach, through the aphotic zone all the way to the gigantic abyssal plain. Much of the abyssal plain is between 3,000 and 6,000 meters (1 ...

This would map out a baseline for life in the abyssal plain, so that potential harm can be better understood. Conservation ...