The border fence dividing the U.S. and Mexico has long been a subject of debate and controversy. Now, artist Asa Fernandez is attempting to paint a stretch of the border fence in Nogales, Sonora, so it looks like it is no longer there.
Scientists have a new worry about a special group of organisms that protects soil on the Colorado Plateau. They’re called “biocrusts,” and they’re easily destroyed when trampled. But new research shows there’s another menace.