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Plant communities are usually nicknamed for the most dominant species, such as a ponderosa pine community or a pinyon-juniper woodland. Mat saltbush, also called matscale, communities live on such harsh soils that they are sometimes the only species in in the community. 

The Anthropocene epoch is a unit of geological time in which humans exert a dominant influence on climate and the environment, but we have not reached consensus on its starting point. 

More than 1,500 fossil footprints allow you to follow dinosaurs as they walked along a lakeshore 150 million years ago. The dinosaur tracksite, the largest in North America, is beside the Purgatoire River in Picketwire Canyon south of La Junta. 

Some species of plant, such as death camas, include toxins in nectar and pollen, presenting a bedeviling paradox. Why attract pollinators and then kill them? 

Analyses of DNA from turkey bones at archeological sites and from modern samples of wild turkeys throughout their range indicate that the domesticated birds in Central Mexico and the domesticated birds from the Southwest are distinctly different. 

Although tumbleweeds were familiar icons of the West, they were not native to the West, nor were they growing around the early western towns when they were established.

Compiling the first global atlas of soil bacteria, researchers have identified a group of around 500 key species that are both common and abundant worldwide.

For more than three decades, a mentally ill man has single-mindedly harassed, threatened and terrorized Kaia Anderson and her family. Her case helped strengthen Colorado's stalking law. Now she's telling her full story.

Last May, I went to the Maze District in Canyonlands National Park to enjoy its unique scenery unusual natural history. On two epic hikes, we encountered a somewhat rare species of milkweed that has turned out to be unusual.

Biological control of pest species evokes both high hopes and deep fears. On the one hand, one might achieve a simple, efficient and economic solution to a problem. On the other hand, the control agent may switch from its intended host to one or several unintended native species.