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January-February 1998 (Volume 86, Number 1)

• "The Molecular Anatomy of an Ancient Adaptive Event," by Antony M. Dean
• "Sinkholes in Evaporite Rocks," by Jospeh D. Martinez, Kenneth S. Johnson and James T. Neal
• "Confronting the Boundaries of Human Longevity," by S. Jay Olshansky, Bruce A. Carnes and Douglas Grahn
• "Solving Polynomials with Computers," by Victor Y. Pan
• "Physiology of Helping in Florida Scrub-Jays," by Stephan J. Schoech

March-April 1998 (Volume 86, Number 2)

• "Metastasis," by Cornelis J. F. Van Noorden, Linda C. Meade-Tollin and Fred T. Bosman
• "Mathematics and Tensegrity," by Robert Connelly and Allen Back
• "Transporting Water in Plants," by Martin J. Canny
• "Creationism's Geologic Time Scale," by Donald U. Wise
• "Is Beauty a Sign of Truth in Scientific Theories?," by James W. McAllister

May-June 1998 (Volume 86, Number 3)

• "Speech Recognition and Sensory Integration," by Dominic W. Massaro and David G. Stork
• "Sampling and Census 2000: The Concepts," by Tommy Wright
• "Chemical Ecology in Antarctic Seas," by James McClintock and Bill Baker
• "The Formation of Star Clusters," by Bruce Elmegreen and Yuri Nikolaevich Efremov
• "Polyembryony in Armadillos," by W. J. Loughry, Paulo A. Prodöhl, Colleen McDonough and John C. Avise

July-August 1998 (Volume 86, Number 4)

• "Animal Contests as Evolutionary Games," by Mike Mesterton-Gibbons and Eldridge S. Adams
• "Good Vibrations," by Joyce McLaughlin
• "Spider-Eating Spiders," by Robert R. Jackson and R. Stimson Wilcox
• "The First Digit Phenomenon," by Theodore P. Hill
• "Is Combustion of Plastics Desirable?," by Bruce Piasecki, David Rainey and Kevin Fletcher

September-October 1998 (Volume 86, Number 5)

• "How the Ribosome Works," by Joachim Frank
• "Reproductive Thermoregulation in Marine Mammals," by Sentiel A. "Butch" Rommel, Ann Pabst and William McLellan
• "How to Boil a Nucleus," by Vic Viola and Kris Kwiatkowski
• "From Society to Genes with the Honey Bee," by Gene E. Robinson
• "Free Internet Access to Traditional Journals," by Thomas J. Walker

November-December 1998 (Volume 86, Number 6)

• "The Mystery of Cloud Electrification," by Robert Black and John Hallett
• "Elasticity in Arteries," by Robert E. Shadwick
• "How Plants Produce Dioxygen," by Veronika A. Szalai and Gary W. Brudvig
• "The Lancelet," by M. Dale Stokes and Nicholas D. Holland