Residents of Tohono O’odham Nation, southwest of Tucson, call them 15 towering monsters. The Border Patrol calls them Integrated Fixed Towers. And the Sierra Club calls them an environmental nightmare.
The Arizona Geological Survey officially moved in with the University of Arizona. That move also comes with a loss of funding, meaning the survey has to find grants and contracts and implement fees for its services.
The drought in California has killed some 60 million trees in the past six years. Scientists are now trying to understand what makes some trees vulnerable and some remarkably resilient. To help them learn, they're using climbers as well as drones.