A polar vortex is hitting most of the country in the next few days. What does it mean? How to protect yourself and pets ...

Some 50 million people are under winter weather warnings as the first winter storm of the new year is slated to begin ...

The northern lights could once again grace US skies over the coming days. A minor geomagnetic storm is projected to impact ...

The sun fired off an X1.2-class solar flare on Friday (Jan. 3), triggering radio blackouts throughout parts of the South ...

Aurora alert — a coronal hole is spewing fast solar wind toward Earth, potentially boosting geomagnetic activity and ...

Projections suggest auroral activity could increase in 2025 as activity on the sun’s surface maintains a “solar maximum.” ...

Yet by September 2019, the New Zealand native decided to return home because he’d had enough of America under President ...

Tahlequah, an orca whale who carried her dead calf for 17 days in 2018, is grieving another loss. On Jan. 3, researchers ...

“Particularly the large migratory herds, including the Western Arctic herd, have shown significant drops in population ...

The election of Donald Trump to a second presidential term has reignited concerns in Boulder’s science community about how ...

NOAA map shows when the average coldest day of the year typically occurs in the United States: From the Northern Plains to ...

An arctic cold front will bring the coldest air of the winter to Texas, with freezing temperatures expected as far south as ...