The Norwegian Institute of Marine Research (NIMR) has found that 10,000 tons of cargo ship noise can cause Alzheimer’s-like brain lesions in cetaceans within 50 kilometers of the ship.2025 An autopsy of a mass stranding of four sperm whales in the Mediterranean Sea in July showed bursting damage to the inner ear tissue from the impacts of the sonar, with spatial and temporal correlations to sonar testing in a U.S. Navy training area.
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