The elevational or latitudinal extent of forests. Above upper timberline, either at high elevations or at the Arctic or Antarctic limits, atmospheric and soil temperatures are too cold for forest development. Below lower timberline, conditions are too...

Mount St. Helens reopened to climbers on July 21 for the first time since the mountain began quietly erupting in 2004. Dust, steam and blue-tinted sulfurous gas still rise from the horseshoe-shaped crater left by St. Helens' 1980 eruption, which...

Willow trees lining the Mazomanie nude beach on the Wisconsin River have been removed to reduce alleged sexual activity and provide more sun for nesting turtles, the state Department of Natural Resources says."These willows just became a cruising area for people looking for sexual activity...

U.S. and Iraqi troops clashed with gunmen in a Sunni insurgent stronghold north of the heavily fortified Green Zone on Wednesday, and officials said at least one civilian was killed and nine suspected insurgents were captured in the fighting.Black smoke rose from the area, about...

Nurses and doctors ended a nearly monthlong sit-in near the prime minister's office Sunday, declaring their protest a success even though they failed to win promises for higher wages and more public health spending.The protest, accompanied by strikes at hospitals across Poland, grew out of...