For centuries, humans have lived underground. Today, that ancient practice is under dire threat—even as cave life makes more ...

Chaco Canyon, a major centre of ancestral Pueblo culture between 850 and 1250, was a focus for ceremonials, trade and political activity for the prehistoric Four Corners area. Chaco is remarkable for ...

In an obscure Arizona canyon, I saw ancient petroglyphs on cliff walls that are pierced by sunlight on the day of the summer solstice. They were no accident.

A settlement has been reached in the civil lawsuit alleging negligence in the fatal shooting of a cinematographer on the set ...

Gov. Katie Hobbs' swift vetoes of two House budget plans set in motion work on a bipartisan plan that could avert a ...