Whale speak, nature's opera & tidal marshes

Living Planet | Deutsche Welle

How do sperm whales express their cultural differences? And what kind of music would birds and the wind make if you gave them the chance? In today's episode, we listen to some curious soundscapes, as well as hear from the climate scientists in Maryland trying to figure out if tidal marshes will continue to be carbon sinks, or if rising sea levels will turn them into dangerous carbon emitters.