[monochrom] Peter Tyack: The intriguing sound of marine mammals

[das ende der nahrungskette]

Peter Tyack of Woods Hole talks about a hidden wonder of the sea: 
underwater sound. Onstage at Mission Blue, he explains the amazing 
ways whales use sound and song to communicate across hundreds of 
miles of ocean.

<http://www.youtube.com/watch?v=mKe3QKcta-8>Link