Experts warn that Puget Sound needs to prepare for a long-term battle against the swiftly spreading virus.

Dr. Robin Kodner studies 2 billion year old snow algae high in mountain fields and glaciers to learn about life's beginnings, and its future.

Across the border in British Columbia's Skagit River headwaters, a proposed open-pit mine has drawn protests from Native tribes, environmentalists and politicians.

Bipartisan proposals before the state legislature would help scientists learn about storing carbon in soils and invest in GPS-guided tractors and climate-friendly cattle feed.

Washington's rain isn't just gloomy — it's creating landslides that cut off rural communities. And as the climate warms, scientists warn they could get more frequent.

Washington might be known for its skiing and snowboarding, but some take to a spot near Leavenworth in hopes of catching perch and other fish.

To learn how mountain lions and humans can coexist, wildlife biologist Lauren Satterfield follows the elusive animals by car, snowmobile and on foot through the wilderness.

Proponents of increased density say it's better for the climate and housing affordability. Opponents worry about property values and the loss of traditional neighborhoods.

One tree stolen from the Pacific Bonsai Museum in Federal Way began as a seed in a tin can at a World War II internment camp.

A flood control dam proposal on the Chehalis complicates a multimillion-dollar effort by tribes and lawmakers to bring back declining salmon runs.

Animal welfare scientist Dr. Bonnie Baird helps zookeepers by using numbers and graphs to learn what animals are trying say.

Health care workers train extensively for outbreaks. After responding to the first American case of the novel virus, they say they are even more prepared.