Letters to the Editor

19116

There are unfortunate multiple misuses of the word “artificial” in describing lab-grown diamonds in this article. In gemological use, artificial means imitation or not real. In fact, the lab-grown diamonds described in your article are real, synthetic diamonds with all the properties and chemistry of natural diamonds. Fred WardBethesda, Md.

19027

Around the early 1950s, during the intermissions of the Sunday radio broadcasts of the New York Philharmonic Orchestra, the announcer introduced recordings of extremely complicated birdcalls. The sounds were obviously somewhat comparable to various musical instruments and marvelously complex. Perhaps one of your bird librarians might be interested in finding the source of the early […]

19115

This article comments that factors other than drought, such as disease, may have been at work in accounting for the disappearance of some Anasazi groups.