Razorbacks have been around for between 3 million and 5 million years, but trouble arrived as the population expanded in the Southwest.
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A proposed 2,500-foot setback initiative has spurred oil and gas companies to file more permits before the November election.
The Land and Water Conservation Fund has pumped nearly $270 million into Colorado over the last 50 years.
Arizona water managers have been leading a series of biweekly meetings since July to work out details of the proposed drought-contingency plan.
The Fish and Wildlife Service said only about 4,700 Gunnison sage grouse remained in 2014.
Between late September to mid-October, southern Coloradans can expect to see tarantulas out and about at sunset looking for a mate.
The lawsuit claims that Secretary of the Interior Ryan Zinke and the BLM didn’t properly assess the environmental impact of drilling on the land.
Total solar eclipses allow scientists rare opportunities to study the corona, the mysterious outer atmosphere of the Sun.
The grizzly hunts would have been the first in U.S. outside Alaska since 1991.
Between 1885 and 2010, National Park areas warmed about 1 degree Celsius, while the nation as a whole warmed just 0.4 degrees Celsius.
The Ryan Fire exploded over the weekend, growing from 3,000 acres on Friday to 19,000. The fire is burning mostly in Wyoming.
Jesper Joergensen, a Denmark native, told police that he started a fire to burn trash, and then that he was grilling in a fire pit.
Coloradans generate 9.6 pounds of trash per person, per day, and only about two pounds of that is recycled.
Recreational shooters would no longer be able to practice in about 225,000 acres of the Arapaho and Roosevelt national forests.
Wirth first became involved with climate change activism through his friendship with another early believer, Carl Sagan.