People in the U.S. are breathing in four times as much wildfire smoke on average than what they did in the past 14 years.

The National Hurricane Center said a tropical depression is likely to form by the middle to later part of this week. Dry air ...

Relief shown by contours. Depths shown by isolines. "A publication of the Decade of North American Geology Project, which is funded, in part, by the G.S.A. Foundation ...

No list is exhaustive, but here are 10 of the best stargazing locations in North America that fall into the coveted Bortle 1 ...

The Pawnee Star Chart is a series of crosses sprinkled around an oval piece of elk skin. Likely made in the early 17th ...

Wildflowers bloom on a grassland near Manhattan, Kansas, the Konza Prairie Biological Station. Some trees can be seen in the ...

Queen Anne Park, with its ancient trees providing generous shade, feels like a secret garden hidden in plain sight. The trees here have stood witness to centuries of Edenton’s history, their sprawling ...