The Presidential Daily Brief

intriguing

  1. Is Whale Song a Threat to National Security?

    Microbiologists have become inadvertent deep-water spies, and the Navy isn’t comfortable with that. Many oceanographers gather raw data and sound clips, such as whale song and seismic rumblings, using hydrophones aimed at the ocean’s darkest depths. This content is automatically uploaded to the internet for open-source use. But the signal occasionally blacks out completely, squelched by the U.S. and Canadian navies to prevent the hydrophones from detecting and broadcasting the activity of military ships and submarines.

    The Atlantic

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