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.
In late September, the Intergovernmental Panel on Climate Change released its Summary for Policymakers for part-one of its massive Fifth Assessment Report. Its message? Earth's climate is warming, and human influence on that warming is clear.
When you hear the word "bee", you're likely to think of the hard-working insects that produce the honey we use. But in North American, a wild diversity of native bees - more than 4,000 kinds - swamps that of honeybees, which were imported from the Old World.
It's been 3 years since the Schultz Fire seared more than 15,000 acres on the San Francisco Peaks north of Flagstaff. About 2/3 of that area, mostly ponderosa pine and mixed conifer forest, was moderately to severely burned. But native plant species have been helping to restore the area.
This year Americans will spend millions of dollars to eradicate weeds in yards, fields, and gardens. Meanwhile, a group of enthusiasts in Durango, Colorado, has come up with a different approach: eat the weeds!
The Southwest may be dry, but it’s interwoven with rushing streams. Where they run cool and clear, they are often enlivened by what the naturalist John Muir described as a “singularly joyous and lovable little fellow.”