Tussock moth caterpillars are stripping fir trees throughout the state. To keep our trees healthy, the Forest Service is fighting back with a spray-on virus straight out of sci-fi.
Using machinery and prescribed burns, land managers hope to safeguard 2.7 million acres of forest from catastrophic fires like the one that destroyed Paradise in California.
A young resident killer whale chases a chinook salmon in the Salish Sea near San Juan Island, Washington, in September 2017. Courtesy of Oregon State University.