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The U.S. Navy uses a team of trained bottlenose dolphins to find underwater mines through echolocation. But recently Navy dolphins discovered something a little unexpected: a rare 19th century Howell torpedo.

Between 1870 and 1889, only 50 of these torpedoes were created, and this is only the second Howell torpedo to be discovered. Back in the time of its creation, the Howell was considered to be a technological innovation and was the only torpedo that could follow a track without leaving a wake.

The torpedo was found off the coast of Coronado Island in California.

The Navy has been training bottlenose dolphins and California sea lions since the 1960s. Dolphins have a unique biosonar system that no technology has been able to recreate.


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