Locals and preservationists have long opposed Trump's plan to redevelop a municipal D.C. golf course. That legal fight escalated after the government cleared hundreds of trees on short notice.

A federal judge has halted the removal of any more trees at the East Potomac Golf Links.

Birds are the only dinosaurs that survived the devastating asteroid impact 66 million years ago.

Arizona State hockey player Matthew Mayich is on life support after he experienced a heat stroke during an August training workout.

On the Navajo Reservation, a would-be energy developer appears to have tried to bribe a local environmental group to drop opposition to his project.

Hurricane Isaias landed Friday night on the Florida Gulf Coast. The storm was expected to bring life-threatening storm surge, damaging winds, flooding and the possibility of tornados.

Florida and Alabama have declared states of emergency in a number of counties, and Florida has ordered evacuations along the panhandle.

The new field of "smoke ecology" examines how wildfire smoke perturbs wild places and animals — and what might be done to prevent its worst mayhem.

The Supreme Court is weighing Boulder, Colorado's lawsuit against oil companies over the effects of climate change.

Oct. 1 is when new federal rules for sharing the Colorado River start. It's going to be messy and courts will likely have to weigh in.