There have been a half-dozen encounters between grizzly bears and humans reported in Montana this month alone, a number experts attribute to a growing bear population stuck in the low country because of the deep snowpack.

Three Greenpeace activists on Sunday climbed up an oil rig off Greenland's coast in an attempt to stop a Scottish oil company from starting deepwater drilling in the arctic waters, the environmental group said.

Science editor Alan Boyle's Weblog: What happened to all the methane that was released into the ocean during last year's oil spill? Scientists are revisiting that question in dueling research papers.

The closest nuclear power plant to tornado-ravaged Joplin, Mo., was singled out weeks before the storm for being vulnerable to twisters.

It's moving and mating season for Florida's 1.3 million alligators, and experts are warning locals and tourists to stay out of the way.

A rescued polar bear cub is thriving at the Alaska Zoo but federal wildlife officials said Wednesday they briefly considered trying to reunite the wild tyke with its mother after the adult bear was spotted on sea ice of the state's northern coast.