Trump's administration plans to ramp up prosecution of unauthorized border crossings. Here's the story of how it became illegal in the first place.
Multiple times over the centuries, climate issues caused Pueblo farming to collapse, taking the establishment down with it. New research suggests there are parallels with American inequalities today.
The U.S. Southwest drifted into a drier state during the last 35 years due to fewer rain-producing weather patterns and hotter temperatures.