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March-April 2026

Volume: 114 Number: 2

A deep photographic exposure captures a time-lapsed view of 3I/ATLAS, an interstellar object and only the third large one confirmed to have passed through our Solar System from elsewhere. 3I/ATLAS has a bright dust tail (color enhanced in this image) that is typical of comets. However, the prior two interstellar objects were quite different, showing the range of small bodies in the universe. The first interstellar object detected, 1I/ʻOumuamua, did not have a dust tail but had unexpected accelerations not caused by gravity that were too strong to be from forces created by radiation. As Darryl Z. Seligman describes in “The Discovery of Dark Comets,” studying this strange interstellar object inspired him and his colleagues to take a closer look at comets in the Solar System that also seem to defy standard definition, and which might belong to an entirely new astronomical category. (Cover image by Dan Bartlett.)

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  • January-February - 2006 - Volume: 94 - Number: 1

    January-February 2006

    Volume: 94 Number: 1

    • "High-speed Imaging of Shock Waves, Explosions and Gunshots," by Gary S. Settles

    • "First Life," by Michael Russell

    • "A Bright Future for Subwavelength Light Sources," by Tineke Thio

    • "Fallout from Nuclear Weapons Tests and Cancer Risks," by Steven L. Simon, André Bouville and Charles E. Land

    • "Ancient Lakes of the Sahara," by Kevin White and David J. Mattingly

  • November-December - 2005 - Volume: 93 - Number: 6

    November-December 2005

    Volume: 93 Number: 6

    • "Biofilms," by Joe J. Harrison, Raymond J. Turner, Lyrium L. R. Marques and Howard Ceri

    • "Imaging Earthlike Exoplanets," by Thomas J. Sherrill

    • "How Tunas and Lamnid Sharks Swim: An Evolutionary Convergence," by Robert E. Shadwick

    • "Yawning," by Robert R. Provine

    • "Ancient Wollemi Pines Resurgent," by Stephan McLoughlin and Vivi Vajda

  • September-October - 2005 - Volume: 93 - Number: 5

    September-October 2005

    Volume: 93 Number: 5

    • "Fighting Cancer Through the Study of Sarcomas," by Igor Matushansky and Robert Maki

    • "Detecting Illicit Nuclear Materials," by Richard T. Kouzes

    • "Cheating Viruses and Game Theory," by Paul E. Turner

    • "Charting Color from the Eye of the Beholder," by Edward R. Landa and Mark D. Fairchild

    • "Water Fountains with Special Effects," by Said Shakerin

  • July-August - 2005 - Volume: 93 - Number: 4

    July-August 2005

    Volume: 93 Number: 4

    • "A New Understanding of Protein Mutation Unfolds," by P. Michael Conn and Jo Ann Janovick

    • "Climate and the Collapse of Maya Civilization," by Larry C. Peterson and Gerald H. Haug

    • "Feeling Smart: The Science of Emotional Intelligence," by Daisy Grewal and Peter Salovey

    • "The Mystery of Masting in Trees," by Walter D. Koenig and Johannes M. H. Knops

    • "The Collapse of the Kinzua Viaduct," by Thomas Leech

  • May-June - 2005 - Volume: 93 - Number: 3

    May-June 2005

    Volume: 93 Number: 3

    • "Predicting a Baseball's Path," by A. Terry Bahill, David G. Baldwin and Jayendran Venkateswaran

    • "The Lion's Mane," by Peyton M. West

    • "Polarization of the Cosmic Microwave Background," by Matthew Hedman

    • "New Ideas About Old Sharks," by Susan Turner and Randall F. Miller

    • "Science and Religious Fundamentalism in the 1920s," by Edward B. Davis

  • March-April - 2005 - Volume: 93 - Number: 2

    March-April 2005

    Volume: 93 Number: 2

    • "The Ecology and Evolution of Hawaiian Spider Communities," by Rosemary Gillespie

    • "Fuel Efficiency and the Economy," by Roger H. Bezdek and Robert M. Wendling

    • "Predicting Addiction," by Lisa N. Legrand, William G. Iacono and Matt McGue

    • "Monitoring Elusive Mammals," by James G. Sanderson, Mogens Trolle

    • "Physics and Feynman's Diagrams," by David Kaiser

  • January-February - 2005 - Volume: 93 - Number: 1

    January-February 2005

    Volume: 93 Number: 1

    • "Exercise Controls Gene Expression," by Frank W. Booth and P. Darrell Neufer

    • "The Star-formation History of the Universe," by Alan Heavens

    • "The Home of Blue Water Fish," by A. Peter Klimley, John E. Richert and Salvador J. Jorgensen

    • "Explosives Detection with Nuclear Quadrupole Resonance," by Joel B. Miller and Geoffrey A. Barrall

    • "Grass-roots Justice in Tanzania," by Brian Paciotti, Craig Hadley, Christopher Holmes and Monique Borgerhoff Mulder

  • November-December - 2004 - Volume: 92 - Number: 6

    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

  • September-October - 2004 - Volume: 92 - Number: 5

    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

  • July-August - 2004 - Volume: 92 - Number: 4

    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