A massive forest fire has been raging in Alberta, Canada, for nearly a month. Scientists say warmer, drier weather has increased the frequency and intensity of fires. For this month's Environmental Outlook: wildfires, climate change and threats to North America’s forests.
In his last book David Rothenberg explored why birds sing. Now he examines the mystery of whale songs. He travels the world to study and play duets with the world’s largest mammals.
- David Rothenberg philosopher, musician, and author of "Why Birds Sing,""Sudden Music," "Hands End," and "Always the Mountains."
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