Deep-sea mining is one of the most contested issues in ocean science today. In this episode, we sit down with Oliver Gunasekara — CEO and co-founder of Impossible Metals, a Y Combinator-backed startup developing AI-powered underwater robots designed to harvest polymetallic nodules from the seafloor with what the company claims is a fraction of the environmental footprint of conventional mining. Oliver makes a serious case: the critical metals needed for the clean energy transition are running short on land, recycling won't close the gap for decades, and the human and environmental toll of terrestrial mining in places like Indonesia and the DRC is already devastating. He argues that Impossible Metals' Eureka Collection System — which hovers above the seafloor, detects life with onboard AI, and selectively picks just 10% of available nodules — represents something genuinely new . We let him make that case. We also press him on it. What does the "10x less ESG impact" claim actually rest on? What do we know — and not know — about deep sea ecosystems at commercial scale? Who really benefits when resources from the common heritage of mankind get extracted? And what does it mean that the full-size system hasn't yet operated in an actual nodule field? This isn't a simple story. It's a window into one of the hardest tradeoffs in the climate transition — and a reminder that "sustainable" is always a claim that deserves scrutiny.
Guest: Oliver Gunasekara, CEO & Co-Founder, Impossible Metals
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