As a coast-to-coast winter storm slices across the U.S. Sunday and Monday, severe thunderstorms are expected to fire up ...

A state of emergency has been declared in five states, with the storm set to bring the coldest temperatures in over a decade.

Last year gave skywatchers multiple stunning sky shows, including the total solar eclipse, the return of the “devil comet,” and multiple nights colored by the northern lights. If you missed seeing the ...