US Attorney General Jeff Sessions speaks to law enforcement officers in St. Louis.
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.
The extreme architectural investment in Chaco Canyon typifies periods of peak building.
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.
Clinging on: Carnaby’s black cockatoo has already lost much of its habitat.
Plans for managing Perth's rapid urban growth have been touted as green. But they still look like robbing the iconic Carnaby's black cockatoo of yet more crucial habitat.
Western Australia’s few remaining giant jarrahs are increasingly lonely monuments to the forest’s towering past.
Amanda Slater/Wikimedia Commons
When Europeans first arrived in Australia's Southwest, they found vast tracts of huge jarrah trees. Now, after logging and dwindling rainfall, only a handful of these giants remain.
Lake Mead in Arizona – water supply is outstripping demand in the Southwest as the weather has gotten warmer and the population has grown.
The U.S. Southwest drifted into a drier state during the last 35 years due to fewer rain-producing weather patterns and hotter temperatures.
Low-cost carrier Southwest Airlines is renowned for its high levels of employee and aircraft productivity.
The recent collapses of Air Australia, Malev and Spanair raise questions about airline strategies and business models. With rising fuel prices and continuing economic turmoil in Europe and elsewhere, what…