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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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    May-June 1999

    Volume: 87 Number: 3

    • "Neutrino Oscillations," by Kenji Kaneyuki and Kate Scholberg

    • "Millipeds," by William A. Shear

    • "Gene Therapy," by Eric B. Kmiec

    • "Light-Reflection Strategies," by Andrew Parker

    • "The New Science of Finance," by Don M. Chance and Pamela P. Peterson

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  • March-April - 1999 - Volume: 87 - Number: 2

    March-April 1999

    Volume: 87 Number: 2

    • "The Evolution of Hemoglobin," by Ross Hardison

    • "The Gestural Origins of Language," by Michael C. Corballis

    • "Mantle Plumes and Mountains," by J. Brendan Murphy, Gary L. Oppliger, George Brimhall and Andrew Hynes

    • "Walking on Water," by Robert B. Suter

    • "Early Canid Domestication: The Farm-Fox Experiment," by Lyudmila N. Trut

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  • January-February - 1999 - Volume: 87 - Number: 1

    January-February 1999

    Volume: 87 Number: 1

    • "Molecular Conservation Genetics," by Mary V. Ashley

    • "Rocks at the Mars Pathfinder Landing Site," by Harry Y. McSween, Jr. and Scott L. Murchie

    • "Foraging by Seabirds on an Olfactory Landscape," by Gabrielle Nevitt

    • "Lead in the Inner Cities," by Howard Mielke

    • "Knowledge Discovery and Data Mining," by Carla E. Brodley, Terran Lane, Timothy M. Stough

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  • November-December - 1998 - Volume: 86 - Number: 6

    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

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  • September-October - 1998 - Volume: 86 - Number: 5

    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

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  • July-August - 1998 - Volume: 86 - Number: 4

    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

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  • May-June - 1998 - Volume: 86 - Number: 3

    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

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  • March-April - 1998 - Volume: 86 - Number: 2

    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

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  • January-February - 1998 - Volume: 86 - Number: 1

    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

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