At Fort Stanton Cave in New Mexico, hundreds of feet below the Earth’s surface, an odd formation made up of an intricate crust of tiny calcite crystals continues to intrigue cave specialists and explorers.

By Tony Davis, The Arizona Daily Star, Tucson May 25--Nearly 20 years after the federal government set aside a huge section of the San Pedro River in the name of conservation, most of it is at risk of becoming ecologically out of whack or is already there, federal records show.

By Keith Rogers By KEITH ROGERS REVIEW-JOURNAL During a ceremony punctuated by raindrops pelting a tent where a new visitor center will be built at Red Rock Canyon, Interior Secretary Dirk Kempthorne approved funding Wednesday for nearly $79 million in projects including wildfire prevention efforts in Nevada.

By BRADY MCCOMBS Construction of two miles of border fencing in the San Pedro Riparian National Conservation Area will resume following Homeland Security Secretary Michael Chertoff's decision Monday to invoke a waiver that exempts border fences from any law.

By BRADY MCCOMBS San Pedro clash pits concerns on border, wildlife PALOMINAS - The San Pedro River is a thin, quiet stream as it cuts north across the U.S.-Mexico border about 3 miles south of this Arizona town.