A June 21 Facebook video shows an image of the OceanGate submersible while audio of sonar beeps and thumping plays in the background. "Here's the audio of the knocking they caught from the submarine," ...
Blue whales near the Seychelles were wiped out half a century ago by whaling. After sightings, scientists set up audio recording devices on the seafloor near the island nation. They found blue whales ...
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