Seafloor Maps Reveal Underwater Caves, Slopes—and Fault Lines

Drone ships, deep-sea robots, and better sonar are finding unknown seafloor habitats as well as volcanoes, faults, and tsunami-triggering slopes.

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Drone ships, deep-sea robots, and better sonar are finding unknown seafloor habitats as well as volcanoes, faults, and tsunami-triggering slopes.

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