A mysterious malady has killed off nearly one-fifth of Colorado's aspens. But forest ecologists have struggled to explain the widespread die-off, known as Sudden Aspen Decline.

If it sounds unusual to have a drought in a rainforest, it is. Low snow and little rain combined to deliver an almost unprecedented drought to southern

There are no tumbleweeds blowing through the streets of Southeast Alaska towns, but, the region has received quite a bit less precipitation than usual over the past nine months.