"A single pulse flow of water reconnects the ‘American Nile’ with the Sea of Cortez for the first time in decades"

"MEXICO CITY — President Enrique Peña Nieto and his top military commanders flew to a modest fishing village in Mexico’s far northwest on Thursday and made a promise to protect a small porpoise called the vaquita that is on the edge of extinction."

"Huge fireballs illuminated the early dawn skies of the Gulf of Mexico on Wednesday as an explosion and fire killed four people and injured as many as 16 others on a large oil platform in the southeastern Bay of Campeche, Mexican officials said."

"Scientists believe the dwindling axolotl, or Mexican salamander, holds secrets of aging and regeneration"

"SANTA URSULA, Mexico — People in the hamlet of Santa Ursula began to worry when the logging started. In a few short weeks, more than a mile of densely forested riverbank was stripped from the Arroyo Sal to make way for heavy dredging equipment."

"MEXICO CITY — Deforestation is down in the Mexican forest that is the winter home of Monarch butterflies, and scientists also hope to see a rebound in the annual migration after it fell to historic lows last year, an expert said Thursday."

"TUCSON, Ariz. — Authorities are testing water from the San Pedro River in southern Arizona that may be contaminated with toxic waste that traveled north after a massive copper mine spill in Mexico this summer."

"Banamichi, Mexico - Liseth Mendez and Judas Barrios milk two cows covered in a cloud of tiny persistent flies as the sun taints in red the surrounding mountains near a ranch less than a kilometre from the Sonora River."

"Water pollution disasters in Mexico have turned into political battles as officials struggled Wednesday to blame each other for the problems."

"PALOMINAS, Ariz. -- The San Pedro River is idyllic on a mid-August morning, with tall cottonwood trees creating a shady respite from temperatures already into the high 80s and muddy banks pocked with animal tracks."