Smoke from wildfires in Canada has spread more than 5,000 miles, reaching parts of Russia and Europe during the past week.

Animal testing typically involves conducting scientific experiments on animals to determine any potential effects a chemical could have when used by humans.

Solar flares can affect us on Earth, and radiation from this flare caused a shortwave radio blackout. A map released by the National Oceanic and Atmospheric Administration (NOAA) shows the entirety of ...

Skywatchers in 15 states may be able to see the northern lights this week. The northern lights, which scientists call aurora ...

More than a dozen states could get the chance to see the northern lights this week, forecasts show. The northern lights, also ...

Nacho Borracho in Seattle’s Capitol Hill neighborhood is exactly that kind of spot – an unassuming joint where the nachos ...

Protesters will converge nationwide for "No Kings" protests. But what are they? Why protest on Trump's birthday and military parade? What to know.

Washington's gas tax will increase by 6 cents per gallon, continuing to go up 2% each year to account for inflation, on July ...

Oregon lawmakers have voted to repeal the state's contested wildfire hazard map. The repeal measure passed the state House on ...

Parent volunteers at Sacajawea Elementary in Vancouver, Washington, repainted a large U.S. map on the playground, first ...

Wildfire smoke from Canada is expected to move over the U.S., impacting air quality for millions of people on Friday and this weekend. Maps and satellite imagery show the large-scale impact of the ...