Farms and cities use so much of the Colorado River's water that little remains for the river's own ecosystem. Will negotiators save what's left?

Nearly two dozen U.S. senators urged the U.S. Department of Agriculture, in a letter, to "prioritize" a vaccine strategy for ...

Scientists say dolphins and orcas have teamed up to hunt salmon off British Columbia. It’s the first time such behavior has ...

Wander through a botanical wonderland outside Phoenix, Arizona complete with canyon views, rare plants, wildlife sightings, ...