Travelers who waited until the last day to make their Thanksgiving holiday treks needed to be prepared for busy highways and the most crowded day yet this week at the nation's airports.

A filament eruption on Monday is ushering in the possibility that night skies could light up in greens, reds and purples this ...

This Thanksgiving, solar storms may produce faint auroras across the northern rim of the United States. Pale auroras may be seen across many northern states Thursday and Friday, but they may be brief ...