The a16z Show The a16z Show

Three Startups Reinventing Critical Infrastructure

Aug 5, 2026 · 1h 15m

Summary

This episode features Will O'Brien of Ulysses, who discusses building autonomous underwater robots for conservation, infrastructure, and defense, while also exploring the resurgence of seasteading. Turner from Mariana Minerals then explains how AI and software streamline critical mineral processing to counter China’s dominance. The discussion highlights technological solutions for ocean stewardship and efficient resource extraction.

Topics discussed

Introduction: A16Z portfolio companies Ulysses, Mariana, and Radiant Ulysses: Building autonomous ocean robots for conservation and commercial use Ulysses: US Navy interest and comparison to Subnautica The Ocean Frontier: Why ocean exploration lags behind space and history of undersea tech Geopolitics: China's autonomous underwater vehicle capabilities and threats Seasteading: Libertarian utopias, logistics, and energy solutions for ocean habitats Protecting Infrastructure: Sensors and robotics for undersea cables Hamilton Club: A professional networking alternative to startup culture Ulysses Vision: Healthy, safe, and prosperous oceans with global operations Mariana Minerals: The complex journey from exploration to refined critical minerals Mining Tech Challenges: Risk aversion, slow adoption, and the junior mining ecosystem Mariana's Approach: Software-first operations, Plant OS, and reducing latency Scaling Innovation: Accelerating commercial deployment of new mining technologies Critical Minerals: Zinc, copper, nickel, rare earths, and exploration needs Policy & Permitting: Streamlining reviews, government support, and international strategy Radiant Origin: Doug's SpaceX background and the pivot to nuclear micro-reactors Nuclear Industry Status: Manufacturing reactors, waste challenges, and market fit Conclusion: Nuclear waste solutions and final thoughts on the episode
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