@CNN: Humpback whales stop singing or shorten their songs with the passing of ships, new research suggests. Commercial ships emit low-frequency noise wherever they roam and this unwanted soundtrack may negatively impact marine life, the study finds. https://t.co/J2dY6WCSlG https://t.co/KnR0MkKK2J

@CNN: Humpback whales stop singing or shorten their songs with the passing of ships, new research suggests. Commercial ships emit low-frequency noise wherever they roam and this unwanted soundtrack may negatively impact marine life, the study finds. https://t.co/J2dY6WCSlG https://t.co/KnR0MkKK2J