The Upsweep is an unidentified sound detected by the NOAA, first recorded in August 1991. Almost siren-like, the Upsweep is ...

BOSTON – Canadian assets overheard "banging noises" in the search for the missing Titan submersible on multiple occasions over the past two days, authorities confirmed during a briefing Wednesday at ...

[Update: Now what? OceanGate sub tragedy sets off a torrent of questions without answers] Searchers are continuing to hear what they describe as “banging” noises as they monitor underwater sounds for ...

Ocean researchers have recorded unidentified "quack" sounds in the sea for years. Credit: Mayehem / Getty Images Both scientists and sailors alike have recorded unique, strange noises in the ocean for ...

The Earth's mighty oceans are even more mysterious than outer space. The majority of the planet's surface is covered by water, but 95% of our oceans remain unexplored. We know more about Mars than we ...

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Smithsonian Institution, Center for Folklife and Cultural Heritage, Ralph Rinzler Folklife Archives and Collections, 600 Maryland Ave., S.W., Suite 2001, Washington ...