Marine biologists have for the first time recorded the song of the world's rarest large whale, the eastern North Pacific right whale, of which fewer than 30 individuals remain.
원문출처 : https://www.cnn.com/2019/06/20/americas/song-rare-whale-intl-scli/index.html
원문출처 : https://www.cnn.com/2019/06/20/americas/song-rare-whale-intl-scli/index.html