These electric-blue night clouds are expanding around the globe, says NASA
July 2, 2019, 11:37 a.m. by Michael d'Estries
Beautiful phenomenon, relatively new to science, may be growing due to greenhouse gas emissions.
Strange wave-shaped clouds roll across Mount Pisgah
June 20, 2019, 3 p.m. by Catie Leary
You might assume this image is the result of some elaborate Photoshop trick, but it's real.
The earliest sunrise of the year isn't on the summer solstice
June 10, 2019, 8:25 a.m. by Russell McLendon
The year's earliest sunrise occurs before the summer solstice, while the latest sunset falls afterward.
Tornado safety: Before, during and after the storm
May 30, 2019, 11:53 a.m. by Clint Williams
Those in the path of a tornado may have a 15-minute warning, if that. Preparation is critical for survival.
How California's improving air quality is putting a dent in the region's dangerous fog
April 24, 2019, 1:41 p.m. by Mary Jo DiLonardo
The dense fog has dropped 76% in recent years.