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 ...

The northern lights, also known as the aurora borealis, may be visible in as many as 15 northern states Wednesday night, June 25, according to NOAA's Space Weather Prediction Center (SWPC). Most 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 ...

The research reveals the chilling truth about the impact of nuclear tests across the U.S., painting a picture of widespread ...

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.

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

The northern lights are expected to grace the skies of some northern states in the wake of a coronal mass ejection from the ...