Whale speak, nature's opera & tidal marshes (rebroadcast)

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 what the future will look like if we change one of Earth's hardest working carbon sinks: saltwater marshes.