Texas leads the nation in snake diversity, with more than 100 species and subspecies — and the most rattlesnake species of ...

Discover the two land borders of the U.S. and the states that share them. Explore the U.S.-Canada border, the longest in the ...

As climate change drives rising temperatures and changes in rainfall, Mexico and the US are in the middle of a conflict over water, putting an additional strain on their relationship.

Photographs made during the Rio Grande Project in New Mexico, Salt River Project in Arizona, and Yuma Project in Arizona and California. The collection includes images of scenery, roads and wagons, ...

The deserts and mountains between Salt Lake City, Utah and Denver, Colorado were viewed together in a slow-motion glide ...

Inside an armored vehicle, an Army scout uses a joystick to direct a long-range optical scope toward a man perched atop the U ...

President Donald Trump has thrust the military into a central role in deterring illegal crossings into the U.S. at its southern ...

“When folks travel to the Southwest, they often think of the Grand Canyon in Arizona or Zion in Utah ... about Big Bend is canoe camping through the deep canyons along the Rio Grande and hiking the ...

The isolation of Guadalupe Mountains National Park, however, is part of its appeal. The dominant feature of the mountains is El Capitan, which rises breathtakingly out of the Chihuahuan Desert, ...

Walking along the Rio Grande in central New Mexico, retired ecologist Gina Dello Russo points to a sandbar at the river’s ...