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 ...

1. The transition from seedlings into trees at alpine tree lines is a temperature-limited process that ultimately sets the tree line elevation at a global scale. As such, tree lines may be key ...

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 ...

Video shows how Alpine Christmas Trees have struggled to provide a large quantity of trees this year. Estimating to sell around 14,000 trees. Almost half of their biggest sale of 28,000 trees. Owner ...