Whales have developed their own very complex language …. but we can still not communicate. We do not understand their language but we know how much oil can be extracted or how to amuse visitors in marine parks. It is shameful how little we know about other species of our world and how disrespectful we treat everything including our own species.   

Marconi, the great pioneer of radio transmission became convinced that sound never dies. It just becomes too quiet for us. So theoretically, he suggested, we could build the right listening device and any sound could be recoverable.