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.)
In This Issue
- Astronomy
- Biology
- Chemistry
- Communications
- Computer
- Engineering
- Environment
- Ethics
- Evolution
- Medicine
- Physics
- Policy
- Psychology
- Technology
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January-February 2011
Volume: 99 Number: 1
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"Fractures and Bindings of Consciousness," by Don M. Tucker and Mark D. Holmes
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"From Treasury Vault to the Manhattan Project," by Cameron Reed
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"Chromatin Evolving," by Gregory A. Babbitt
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Classics: "Galaxies," by Virginia Trimble
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November-December 2010
Volume: 98 Number: 6
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"An Empire Lacking Food," by Craig McClain
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"The Anatomy of a Neutron," by Timothy Paul Smith
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"The 95 Percent Solution," by John Falk and Lynn Dierking
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September-October 2010
Volume: 98 Number: 5
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"Evolution on a Frozen Continent," by David Lambert, Craig Millar, Siva Swaminathan and Carlo Baroni
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"High-power Lasers," by Todd Ditmire
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"A Bigger, Better Brain," by Maddalena Bearzi and Craig Stanford
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"Gifts and Perils of Landslides," by Kenneth Hewitt
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July-August 2010
Volume: 98 Number: 4
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"Ivermectin and River Blindness," by Philip A. Rea, Vivian Zhang and Yelena S. Baras
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"Liquid Fluoride Thorium Reactors," by Robert Hargraves and Ralph Moir
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"Wiggling Through the World," by Daniel I. Goldman and David L. Hu
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"Science After the Volcano Blew," by Douglas W. Larson
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May-June 2010
Volume: 98 Number: 3
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"To Signal Is Human," by Alex (Sandy) Pentland
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"Revealing the True Solar Corona," by Richard Woo
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"Development Influences Evolution," by Katherine Willimore
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"To See for One's Self," by Darin L. Wolfe
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March-April 2010
Volume: 98 Number: 2
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"The Ultimate Mouthful: Lunge Feeding in Rorqual Whales," by Jeremy A. Goldbogen
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"The Race for Real-time Photorealism," by Tomas Akenine-Möller and Henrik Wann Jensen
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"Gene-Culture Coevolution and Human Diet," by Olii Arjamaa and Timo Vuorisalo
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"Finding Alzheimer's Disease," by Ralf Dahm
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January-February 2010
Volume: 98 Number: 1
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"Assessing Risks from Bisphenol A," by Heather Patisaul
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"Phoenix on Mars," by Walter Goetz
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"Neural Interfaces," by Warren M. Grill
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"Carbon Dioxide and the Climate," by James Rodger Fleming and Gavin Schmidt
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November-December 2009
Volume: 97 Number: 6
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"Spitzer's Cold Look at Space," by Michael Werner
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"Harvestmen," by William A. Shear
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"The Other Climate Threat: Transportation," by Andreas Schäfer, Henry D. Jacoby, John B. Heywood and Ian A. Waitz
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"Going with the Floe?" by Stephanie Pfirman, Bruno Tremblay and Charles Fowler
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September-October 2009
Volume: 97 Number: 5
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"Mitochondrial Death Channels," by Keith A. Webster
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"Reconnecting Magnetic Fields," by James Burch and James Drake
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"Taking Measure of Biofuel Limits," by Thomas R. Sinclair
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July-August 2009
Volume: 97 Number: 4
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"Bubbles and Flow Patterns in Champagne," by Guillaume Polidori, Philippe, Jeandet and Gérard Liger-Belair
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"Human History Written in Stone and Blood," by Zenobia Jacobs and Richard G. Roberts
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"Of Beauty, Sex and Power," by Andrew Gelman and David Weakliem
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"Proteomimicry," by Jerry H. Brown
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