Seen from space, the snow-capped Alps are going green

The famous snow-capped peaks of the Alps are fading fast and being replaced by vegetation cover—a process called "greening" that is expected to accelerate climate change, a study said Thursday.

How new bird species arise

Much of a centuries-old debate over where and how new bird species form has now been resolved. Researchers at the University of Copenhagen have provided evidence that birds in mountainous areas—where the vast majority of ...

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