Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
About the Cover


African Serpent Eagle (Dryotriorchis specatabills). When optimally accom-modated, this eagle's image of the photographer is much sharper than the photographer's own retinal image of the bird. See page 920. [Photograph by Lionel G. Standing, Chicago Wesley Memorial Hospital, Chicago, Illinois]


[Table of Contents]

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)