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January-February 2004 (Volume 92, Number 1)

• "The Cosmic Web," by Robert A. Simcoe
• "Human Biomonitoring of Environmental Chemicals," by Ken Sexton, Larry L. Needham and James L. Pirkle
• "Ancient Earthquakes at Lake Lucerne," by Michael Schnellmann, Flavio S. Anselmetti, Domenico Giardini, Judith A. McKenzie and Steven N. Ward
• "Salt Marshes Under Siege," by Mark Bertness, Brian Reed Silliman and Robert Jefferies
• "The Evolution of Jealousy," by Christine R. Harris

March-April 2004 (Volume 92, Number 2)

• "Internal Tides and the Continental Slope," by David A. Cacchione and Lincoln F. Pratson
• "Amphibian Decline and Emerging Disease," by Joseph M. Kiesecker, Lisa K. Belden, Katriona Shea and Michael J. Rubbo
• "The Origin of Matter," by James M. Cline
• "The Artificial Nile," by Scott W. Nixon
• "The Adaptive Value of Religious Ritual," by Richard Sosis

May-June 2004 (Volume 92, Number 3)

• "The Imperiled Giants of the Mekong," by Zeb S. Hogan, Peter B. Moyle, Bernie May, M. Jake Vander Zanden and Ian G. Baird
• "Optically Trapped Fermi Gases," by John E. Thomas and Michael E. Gehm
• The Structure of the Human Brain," by John S. Allen, Joel Bruss and Hanna Damasio
• "Leaves, Flowers and Garbage Bags: Making Waves," by Eran Sharon, Michael Marder and Harry L. Swinney
• "The Shadow Effect and the Case of Félix Tisserand," by William I. McLaughlin and Sylvia L. Miller

July-August 2004 (Volume 92, Number 4)

• "How Do Supercontinents Assemble?" by J. Brendan Murphy and R. Damian Nance
• "Mad-Cow Disease in Cattle and Human Beings," by Paul Brown
• "Amazing Organohalogens," by Gordon W. Gribble
• "Gravitational Waves and the Effort to Detect Them," by Peter S. Shawhan
• "Free Will and Free Won't," by Sukhvinder S. Obhi and Patrick Haggard

September-October 2004 (Volume 92, Number 5)

• "Cell Fusion," by Brenda M. Ogle and Jeffrey L. Platt
• "Diamagnetic Levitation," by Ronald E. Pelrine
• "The Design and Function of Cochlear Implants," by Michael F. Dorman and Blake S. Wilson
• "The Lifestyles of the Trilobites," by Richard A. Fortey
• "The World's Highest Forest," by Jessica Purcell, Alan Brelsford and Michael Kessler

November-December 2004 (Volume 92, Number 6)

• "Plant Scents," by Eran Pichersky
• "Heavy-Metal Nuclear Power," by Eric P. Loewen
• "Relative Pitch and the Song of Black-Capped Chickadees," by Ron G. Weisman and Laurene Ratcliffe
• "The Puzzling Origins of AIDS," by Jim Moore
• "The Decline of the Blue Crab," by Richard F. Lee and Marc E. Frischer