Spring mounds are found in arid regions worldwide where geological formations force groundwater to the surface. In the U.S., the feature is especially common in the mineral-rich soils of the Great Basin and Mojave Deserts.

Arizona is home to over 1,000 volcanoes and has three active volcanic fields, the largest of which is the San Francisco Volcanic Field near Flagstaff.

Waking on winter solstice to a hushed world of bright light, we look outside and see fresh-fallen snow.

The original Christmas Bird Count involved 27 birders, who tallied up 90 species on Christmas Day. More than a century later, the survey continues in what may be the world’s longest-running community science project.

The Relict Leopard Frog was once found in wetlands throughout northwest Arizona, southeast Nevada and southwest Utah. It was thought extinct until isolated populations were found in Nevada in 1991.

When you think of armadillos, you may conjure up images of Texas and a small, armored possum-like creature, yet Arizona was once home to a gigantic armadillo species.

High-tech may be coming to the Southwest’s rangelands with an idea called virtual fencing.

At the heart of the Colorado Plateau sits the largest concentration of archaeological remnants in the country, known as the Canyons of the Ancients National Monument.

Jumping spiders are common on the Colorado Plateau but are also found worldwide. These daytime predators are great leapers — some can jump nearly 40 times their body length.

Parched corn is a favorite winter food of the Zuni of northern New Mexico. It's to be made only in the winter months as it may adversely affect fresh corn crops in the field if prepared during the growing season.