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Underwater Robot Stealthily Swims With a Propulsion System You Can’t See – Gizmodo Australia

Sound travels faster and farther underwater because it’s denser than air, and that can make it harder for researchers trying to study marine life who get an early…

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Sound travels faster and farther underwater because its denser than air, and that can make it harder for researchers trying to study marine life who get an early heads up to go into hiding. But a new underwater robot could move stealthily through the waves using a propulsion system that doesnt rely on a propeller or any visible moving parts.
Getting around underwater isnt particularly hard, weve had functional submarines for hundreds of years, believe it or not. But most rely on moving propulsion…

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