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Baleen whales evolved unique structures that help them echolocate — but human noise pollution is too much for them

Until now, scientists did not know how whales produced their signature songs. A new study examined the vocal anatomy of three whales and found how they do it, as well as its sad limits.

A team of scientists led by the University of Southern Denmark has uncovered the mechanism behind the complex vocalizations of baleen whales

In the laboratory, the scientists blew air through the voice boxes under controlled conditions to see what tissues might vibrate. - How Do Whales Sing? Scientists Point To A Specialized Voice Box That Other Animals Don't Have

Baleen whales have evolved a special voice box to help them to sing underwater -- but this could also make them uniquely vulnerable to being drowned out by human noise pollution, according to new research published Wednesday.