THE mountain tops of the Alps present to the clear planetary atmosphere bare granite rocks that saw at the sky with jagged teeth. In the winter these inaccessible heights are paralyzed into a cold ...

One of the most widespread types of forest in Australia’s high country is facing an existential threat. We need bold action ...

We all know what tree line is in Colorado: the point above which trees don’t grow. But what determines tree line: Cold? Soil conditions? Precipitation? And is tree line different in various parts of ...