Impossible Metals' Eureka Robot Collects Seabed Nodules at 4,000 m

How the robot avoids dredging the seabed

Eureka hovers above the seabed rather than driving along it. Its vision systems analyse the surroundings, and mechanical arms pick only the chosen rocks. To return, the robot uses a buoyancy-control system based on water displacement, so no long pipes are needed to lift material from the deep.

The nodules contain minerals used in electronics and batteries. Conventional deep-sea mining raises concerns about destroyed marine habitats and stirred-up sediment. The company says its system aims to reduce those effects, but the trial does not yet prove an absence of environmental harm or readiness for industrial-scale operation.

What comes next

Impossible Metals plans a larger version, Eureka III, to be assessed in 2027 by an independent scientific team aboard the German research vessel RV SONNE. The assessment is part of an environmental-impact study overseen by Germany's Federal Institute for Geosciences and Natural Resources.

The minerals gathered in the test will go to research by Viridian Biometals, which is studying whether bacteria can extract metals in place of some chemical processes. The September trial is a proof of concept for selective collection in the deep ocean, not the start of commercial mining and not evidence of its environmental safety at scale.