Call it serendipity, the fate of the gods, or simple biology, but it seems that Cape Hatteras National Seashore is undergoing an invasion of sea turtles. And that means more beach closures to off-road vehicles and pedestrians.

Missing commas and wayward apostrophes are an endangered species when confronted by Jeff Michael Deck and Benjamin Douglas Herson. But that was before the grammar vigilantes ran afoul of the law after editing an historic sign in Grand Canyon National Park.

Glacier National Park officials, frustrated by six days of fruitless searching for a missing hiker, say they'll scale back efforts on Tuesday unless new leads are discovered.

Backcountry rangers in some Alaska national parks routinely signal their position with "Spot," a personal locater beacon that can be used to summon help or to simply let friends know you're OK. Recently, Spot helped rangers find two backcountry travelers in Sequoia National Park who found themselves in trouble.