Miners and tourists alike are contaminating Argentina's caves, say scientists, who warn that fragile underground ecosystems and archaeological sites are at risk.
Several crabs, shrimp, sea stars, and other marine species had likely never been seen until scientists went exploring in the Northwestern Hawaiian Islands this fall.
Florida's explosive population growth—and the unquenchable thirst that comes with it—has some wondering how long the spring-fed Suwannee River will stay wild.
Which World Heritage sites—places like the Grand Canyon and the Pyramids—are being lovingly preserved, and which are being loved to death? See the top and bottom five.
National Geographic's Center for Sustainable Destinations has ranked the world's top natural and cultural treasures, issuing praise for some sites and dire warnings for others.
Florida's manatees have rebounded from the brink of extinction, but experts say their survival depends on finding food and warm waters along the state's increasingly busy coast.
At least eight colorful new species of orchid have been discovered during surveys of previously unexplored forests in the Pacific nation of Papua New Guinea.
This week: "Elvis" woodpecker sighted, anti-terrorist fish guard cities, mystery of fingerprintless people solved, python eats pregnant sheep, and more.
It hasn't yet reached biblical proportions, but the plague of locusts currently infesting the resort town of Cancún has some residents looking to the heavens for help.
