News tagged with north america

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Cordilleran terrane collage

In the August 2014 issue of Lithosphere, Steve Israel of the Yukon Geological Survey and colleagues provide conclusions regarding the North American Cordillera that they say "are provocative in that they b ...

Aug 01, 2014 4.4 / 5 (5) 0

Where have all the swallows gone?

Extinction: the permanent loss of a species. It is deeply troubling—and scientists and birdwatchers are ringing the alarm about a bird species that only a few decades ago was widespread and very common.

Jul 23, 2014 4.9 / 5 (12) 2