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

Cover Figure


COVER Two eggs of the red abalone with hundreds of sperm cells attached to the envelope surrounding each egg (inner circle, about 175 micrometers in diameter). Sperm are also trapped in the transparent outermost jelly layer. This special issue discusses the latest theories on sex: how it got started, how it works, and who gets it. See the Vacquier Review and the special section beginning on p. 1979. [Photo: V. D. Vacquier]

[Table of Contents]

To Advertise     Find Products

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