Horseshoe Bend, Glen Canyon, Lake Powell, Page My Arizona adventure continued up north – starting from Tucson, through Sedona ...

In one of the largest deals to protect open space in the Bay Area over the past decade, an environmental group is purchasing a scenic redwood forest in the North Bay that will create a 7-mile-long ...

Stunning discoveries and fresh breakthroughs in DNA analysis are changing our understanding of our own evolution and offering a new picture of the "other humans" that our ancestors met across ...