In ancient China, spring rains were called “as precious as oil” for their vital role in nature’s spring revival. Today, a unique climate phenomenon known as “spring persistent rainfall” (SPR) prevails ...

Something very strange appears to be happening deep, deep underneath the U.S. Midwest and the Ohio Valley. North America’s geological core has persisted for more than a billion years; it’s what ...

A layer of rock just 520 million years old sat directly on top of ancient rock dating back 1.4 to 1.8 billion years.

"Plan of development in the geological history of North America ... by James D. Dana": p. [31]-45 Address delivered on retiring from the duties of president of the American association for the ...