Tech.SightSIGHTINGS Cell Shocked + See all authors and affiliations Science 19 Dec 1997:Vol. 278, Issue 5346, pp. 2143DOI: 10.1126/science.278.5346.2143b Article Info & Metrics eLetters Log in to view full text As a service to the community this article is available to view for free. Use your via AAAS ID to log in or register for a free account Register for Free Join/Subscribe 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.