As the world shifts away from fossil fuels, the demand for battery-grade metals like manganese, nickel, cobalt, and copper has skyrocketed. This has led to a controversial new frontier: deep-sea mining. In the Clarion-Clipperton Zone of the Pacific Ocean, companies are testing technology to harvest polymetallic nodules from the seabed, a process that could have devastating, irreversible consequences for fragile marine ecosystems. While industry proponents argue that these resources are essential for a sustainable future, environmentalists and scientists warn that we are on the brink of destroying the last untouched part of our planet before we even understand it.