The song of the whales cannot with the noise of the ships. The analysis of their larynx reveals how these marine mammals evolved to communicate underwater and finds a depth limit under which they cannot produce sounds.

Up to here, as land animals do. But with whales they have the ability to reuse that flow that they seem to send back to the lungs and generate new sounds again. “They have developed new structures because the vocal cords would hinder rapid breathing at the surface,” says Professor Coen Elemans at the University of Southern Denmark.