VOLUME 100 | NUMBER 3 | May 2013
Charles T. Ambrose
Neuroangiogenesis provides a basis for understanding dementias of aging
Katrina G. Claw
Sperm and eggs are ubiquitous and diverse. What drives them to diverge?
Katie L. Burke
Healthy bacteria may be the cure to amphibian decline worldwide
Robert Louis Chianese
Some Earth art uses natural materials while still showcasing the artist
Henry Petroski
Like so many bridges in the United States, this one has exceeded its planned life span
Catherine Clabby
Nearly nondistorting fluorescent tags can capture growth patterns in bacterial cell walls
William E. Conner
Bats and sea mammals hunt with sound, but prey use similar tools to evade them
Brian Hayes
Some curves are so convoluted they wiggle free of the one-dimensional world and fill up space
Fenella Saunders
A single ring is easy—how about a chain or a trefoil?
Kevin Heng
The ubiquity of worlds beyond our Solar System confounds us
Andrew Gelman, Thomas Basbøll
Whether data are numerical or narrative, removing them from their context represents an act of plagiarism
Fenella Saunders
A review of Turing’s Cathedral: The Origins of the Digital Universe, by George Dyson
David Schoonmaker
A brief review of em>Antarctica: An Intimate Portrait of a Mysterious Continent, by Gabrielle Walker, and Secrets of the Ice: Antarctica’s Clues to Climate, the Universe, and the Limits of Life, by Veronica Meduna
Fenella Saunders
A brief review of Hubble's Universe: Greatest Discoveries and Latest Images, by Terence Dickinson
Hallie Sessoms
A brief review of Into Great Silence: A Memoir of Discovery and Loss among Vanishing Orcas, by Eva Saulitis
The Editors
This issue marks the debut of our new, brief and occasional books section
David Van Tassel, Lee DeHaan
Breeding perennial grains could improve food security and soil health
About once a month at Sigma Xi headquarters, we liven up the lunch hour with an American Scientist Pizza Lunch talk. In these informal lectures, scientists describe new research to nonscientists. The series is light on jargon but heavy on solid science. Each Pizza Lunch offers an in-depth look at its subject, whether it's bedbugs or the smart grid. Click below to read about and download these talks -- and to subscribe!
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