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DARPA wants robots to 3D print underwater concrete using sand from the seafloor

Summary by Business Insider
US Navy sailors repair damaged port walls at Palau during a training event in 2024.Chief Builder Tyler Ault/US NavyDARPA wants to 3D print concrete underwater using seafloor sediment and seawater.The supporting tech could autonomously repair ports, seawalls, cables, and other maritime infrastructure.The military sees underwater construction as a potential advantage in contested logistics.The US military's research arm wants to find ways to 3D pr…

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Business Insider broke the news in New York, United States on Tuesday, August 18, 2026.
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