07 September 2004
Vol 2004, Issue 249

About The Cover

Cover image expansion

COVER This week features a Review on signaling pathways activated by mechanical stress that promote osteoblast proliferation. The devastating consequences of osteoporosis, a degenerative disease in which bone mass is lost, are most commonly experienced by the elderly, and this Review accompanies a Science Special Issue on aging. The image is of bone. [Image: D.W. Dempster, E. Shane, W. Horbert, R. Lindsay, Helen Hayes Hospital, West Haverstraw, NY.]