29 September 2006
Vol 313, Issue 5795

About The Cover

Cover image expansion

COVER Through comparative genomics, scientists are learning about the forces that have promoted diversity or imposed constraints on our biological machinery. As described in a special section beginning on page 1907, comparative genomics not only gives us a view of our evolutionary history but also illuminates human physiology and suggests new approaches to attacking diseases. Image: Kelly Buckheit Krause