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January-February 2019

Volume: 107 Number: 1

For about 2,000 years, starting in about 1000 BCE, the Maya city of El Ceibal was a bustling urban center with an estimated peak population of up to 52,000 inhabitants. Today this important archaeological site is almost inaccessible beneath farmlands, modern settlements, and protected forest, but archaeologists can create a detailed map of the site, thanks to a laser-based technique known as airborne lidar, short for light detection and ranging. As explained in “Estimating Ancient Populations by Aerial Survey,” the technique calls for aircraft with specialized laser equipment to fly slowly over the site, collecting topographic information from laser reflections from the ground, archaeological structures, and vegetation. Computer programs then create a contour map of the area that includes buildings, earthworks, irrigation canals, and roads, with decimeter accuracy. (Lidar data collected and image created by the National Center for Airborne Laser Mapping.)

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  • November-December - 2018 - Volume: 106 - Number: 6

    November-December 2018

    Volume: 106 Number: 6

    • "America's Cat Is on the Comeback," by Michelle LaRue

    • "Going Nowhere Fast," by Ben Allanach

    • "Collecting Evolution," by Matthew J. James

  • September-October - 2018 - Volume: 106 - Number: 5

    September-October 2018

    Volume: 106 Number: 5

    • "Gravitational Wave Astronomy," by Joey Shapiro Key and Tyson Littenberg

    • "Why Do Galaxies Start Out as Cosmic Pickles?" by Joel Primack

    • "Gaia Reveals the Milky Way," by Ronald Drimmel

  • July-August - 2018 - Volume: 106 - Number: 4

    July-August 2018

    Volume: 106 Number: 4

    • "Mystery of the Lost Reptiles" by Daniel T. Ksepka

    • "High-Tech Homelessness," by Virginia Eubanks

    • "Maxwell Zombies: Conjuring the Thermodynamic Undead," by Daniel P. Sheehan

    • "Learning to See," by Gene Tracy

  • May-June - 2018 - Volume: 106 - Number: 3

    May-June 2018

    Volume: 106 Number: 3

    • "Is Drug Addiction a Brain Disease?" by Marc Grifell and Carl L. Hart

    • "The Shape of Life," by Sophia Roosth

    • "Mass-Producing Graphene," by Les Johnson and Joseph E. Meany

  • March-April - 2018 - Volume: 106 - Number: 2

    March-April 2018

    Volume: 106 Number: 2

    • "The Secret History of Gravitational Waves," by Tony Rothman

    • "The Impish Side of Evolution’s Icon," by James T. Costa

    • "3D Printing of Bone Implants and Replacements," by Susmita Bose, Samuel Ford Robertson, and Amit Bandyopadhyay

  • January-February - 2018 - Volume: 106 - Number: 1

    January-February 2018

    Volume: 106 Number: 1

    • "Living in an Elephant Landscape," by Jonathan Salerno, Lin Cassidy, Michael Drake, and Joel Hartter

    • "Slicing Sandwiches, States, and Solar Systems," by Theodore P. Hill

    • "Zircons: More Precious Than Diamonds," by Donald R. Prothero

  • November-December - 2017 - Volume: 105 - Number: 6

    November-December 2017

    Volume: 105 Number: 6

    • "Adapting Your Body Clock to a 24-Hour Society," by Alexis Webb and Erik Herzog

    • "Cassini and the Rings of Saturn," by Matthew S. Tiscareno

    • "The New Language of Mathematics," by Daniel S. Silver

    • "The Persistence and Peril of Misinformation," by Brian G. Southwell, Emily A. Thorson, and Laura Sheble

  • September-October - 2017 - Volume: 105 - Number: 5

    September-October 2017

    Volume: 105 Number: 5

    • "The 'Simplest Satellite' That Opened Up the Universe," by Lev Zelenyi and Olga Zakutnyaya

    • "Why Ecology Needs Natural History," by John G. T. Anderson

    • "Structural Support for Damaged Tissue Repair," by Treena Livingston Arinzeh, Jennifer Moy, and Gloria Portocarrero Huang

    • "The Evolutionary Advantage of Burrowing Underground," by Anthony J. Martin

  • July-August - 2017 - Volume: 105 - Number: 4

    July-August 2017

    Volume: 105 Number: 4

    • "The Colonial Origins of Tropical Field Stations," by Megan Raby

    • "Reexamining Lyell’s Laws," by Michael R. Rampino

    • "Questioning Copernican Mediocrity," by Howard A. Smith

    • "How to Tame a Fox and Build a Dog," by Lee Alan Dugatkin and Lyudmila Trut

  • May-June - 2017 - Volume: 105 - Number: 3

    May-June 2017

    Volume: 105 Number: 3

    • "Anyone Can Become a Troll," by Justin Cheng, Cristian Danescu-Niculescu-Mizil, Jure Leskovec, and Michael Bernstein

    • "Replaying Evolution," Zachary D. Blount

    • "Circular Visualizations," by Manuel Lima

    • "The Dark Side of the Universe," by Pauline Gagnon