When fin whale sounds were first recorded by US biologists, they did not realize that these unusually loud, long, pure and regular sounds were being made by whales.
Cando os sons do rorcual común foron rexistrados por primeira vez por biólogos estadounidenses, os investigadores non se deron conta de que estes sons excepcionalmente altos, longos, puros e regulares eran producidos por baleas.