Articles Alert

The Scientist has asked a group of experts to comment periodically upon recent articles that they have found noteworthy. Their selections, presented here in every issue, are neither endorsements of content nor the result of systematic searching. Rather, the list represents personal choices of articles the columnists believe the scientific community as a whole may also find interesting. Reprints of any articles cited here may be ordered through The Genuine Article, 3501 Market St., Philadelphia,

Peter Smith
Sep 2, 1990

The Scientist has asked a group of experts to comment periodically upon recent articles that they have found noteworthy. Their selections, presented here in every issue, are neither endorsements of content nor the result of systematic searching. Rather, the list represents personal choices of articles the columnists believe the scientific community as a whole may also find interesting. Reprints of any articles cited here may be ordered through The Genuine Article, 3501 Market St., Philadelphia, Pa. 19104, or by telephoning (215) 386-4399.


Author: PETER J. SMITH
Department of Earth Sciences
Open University
Milton Keynes, U.K.

  • Molecular orbit calculations suggest that potassium is not enhanced in sulfur, iron, or iron sulfides at the high pressures of the earth's outer core. Thus, most of the earth's potassium cannot be in the core, and the earth therefore cannot be chondritic in potassium. Nor can the geomagnetic core dynamo be powered by the radioactive...

Interested in reading more?

Become a Member of

Receive full access to digital editions of The Scientist, as well as TS Digest, feature stories, more than 35 years of archives, and much more!
Already a member?