Volcanic eruptions, not natural variability, were the cause of an apparent "Atlantic Multidecadal Oscillation,"

Burning fossil fuels has long powered world economies while contributing to air pollution and the buildup of greenhouse gases.

Jon Nese, host of Penn State’s “Weather World,” says you can trace the roots of a longtime partnership with the astronomy and astrophysics department to the ancient Greek meaning of the word “meteorology.”

Since 1890, the National Weather Service has relied on a network of volunteer observers.

The measures instituted in April to help curb the spread of COVID-19 across the United States may hold clues for improving air quality, according to researchers.