Many people know that stars appear to twinkle because our atmosphere bends starlight as it travels to Earth. But stars also have an innate “twinkle” — caused by rippling waves of gas on their surfaces ...

PUNXSUTAWNEY, Pa. — The crowd started piling into Gobbler's Knob at 3 a.m. on Sunday, happy to wait more than four hours in freezing cold to see the celebrity groundhog Punxsutawney Phil emerge from ...

It's been a harsh winter, especially during January when much of the U.S. was hit with a major winter storm followed by an Arctic blast of below-average temperatures and a "once in a generation ...