A week of great events commemorate the 150th anniversary of the Civil War Battle of Shiloh.

Grizzly and black bears are starting to come out of hibernation in Grand Teton and Yellowstone national parks, prompting officials there to warn visitors about the hungry bruins.

A collection of artists' shacks set in the dunes of Cape Cod National Seashore has been added to the National Register of Historic Places following two years of study.

A second search-and-rescue mission in the past week has been initiated at Great Smoky Mountains National Park, where a 23-year-old man is thought to have vanished in the park not far from the Sugarlands Visitor Center.