Some 27 national parks and monuments protect the Colorado Plateau’s remarkable canyons, rivers, and wide-open spaces. But, people increasingly visit the plateau to experience another rare natural resource: its dark skies.
Arizona claims a unique population of desert-nesting bald eagles. Those eagles often build their big bulky nests near water, including lakes and rivers in the northern part of the state. The birds use about anything they can find in nest construction—including used fishing line.
No city park or town plaza is complete without the presence of ubiquitous house sparrows — birds so resourceful and adaptable that they can be found even at remote ranches with just a couple of trees. House sparrows are the little brown birds, often with black bibs, that hop around on the ground, cadging bugs, leftover French fries and sandwich crumbs.
In modern times human presence has influenced the size and number of wildfires on the Colorado Plateau. We are, in part, responsible for more big fires and fewer small ones. But is there also a connection between ancient peoples and wildfire?
The colorful red rock geology of Sedona looks timeless. But, the complicated topography hides layers of rock that aren't as solid as they appear. And that might - in some places - even pose a threat to humans.
Grand Canyon river guides work long hours. In the last 2 years, some of them took on a seemingly unlikely new duty: collecting flies. By doing so, they've helped scientists learn more about the big canyon's aquatic food web.
Drought is a universally understood phenomenon — especially here in the arid Southwest. But what does drought really mean? To help define the term, and the concept, scientists use several commonly used drought indices. Each summarizes thousands of data points on rainfall and other information into a single handy number.