Letters A Question of Permanence Donald A. WindsorPost Office Box 604, Norwich, NY 13815, USA + See all authors and affiliations Science 03 Mar 2000:Vol. 287, Issue 5458, pp. 1591DOI: 10.1126/science.287.5458.1591e Donald A. WindsorFind this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters Log in to view full text Via AAAS ID This article is available to AAAS members. If you are a AAAS Member use your via AAAS ID and password to log in. Not a member? Click here to join. Join/Subscribe Purchase Article Activate Member Account Renew Subscription Recommend a subscription to your library Help for librarians Order a single issue Free with registration Science research is available free with registration one year after initial publication. To get your free access please visit our registration form.