About once a month at Sigma Xi headquarters, we liven up the lunch hour with an
talk. In these informal lectures, scientists describe new research to non-scientists. Each Pizza Lunch offers an in-depth look at its subject, whether it's bedbugs or the smart grid.
After each talk,
editors chat with the speakers about their research. Anyone can listen in via our
Pizza Lunch podcast. Don’t miss our rich archives of full-length audio slideshows of earlier lectures, too.
It’s difficult to envision what dimensions beyond 3D are, and why physicists, chemists, and mathematicians want to study them. Duke University chemist Patrick Charbonneau studies the theory behind the formation of glass, tackling questions about an area of research called the glass problem. His research has helped progress this field to a new paradigm. American Scientist associate editor Katie L. Burke interviewed him in September 2013.
Photo credit: Les Todd/Duke Photography.
Most people immediately assume someone working in the US Army does combat or engineering, but there are a vast and unique set of science skills among those who serve. An Army veterinarian discusses his journeys around the world studying zoonotic diseases, infections that jump from animals to humans, including influenza A virus subtype H5N1.
Lieutenant Colonel Sam Yingst, PhD, is the chief of the US Army’s Epidemiology and Disease Surveillance Department and studies many zoonotic diseases worldwide and assists those in developing countries with their research.
When people think of the fastest animals, most consider running cheetahs, flitting hummingbirds, or jumping kangaroos. But there's a level above what we think of as “fast”: Ultrafast organisms conserve energy and move in nano- or even micro-seconds.
Dr. Sheila Patek discusses her research with two ultrafast creatures: mantis shrimp and trap-jaw ants.
In this Science Hangout, two animal behaviorists, Marian Wong of University of Wollongong in Australia and Peter Buston, PhD, of Boston University, explain to associate editor Katie Burke, PhD, that the clownfish behavior in the Disney-Pixar film Finding Nemo is completely off the mark.
The formation of tiny particles of pollutants in the atmosphere, raindrops in a cloud, and cosmic dust share common physics, closely related to a process called nucleation, the means by which molecules begin to form solids. The key unknown is the physics and behavior of nanoclusters that are far more complex than a single molecule, yet not big enough to be considered solids or liquids. Davide Lazzati, PhD, discusses his research on cosmic dust and how additional findings can improve the current theory's performance and ability to predict the properties and formation of nanoparticles.
There is little truth to the saying "what you don't know can't hurt you" when it comes to infection with bacteria in the genus Bartonella. Over two decades of research, veterinarian and professor of medicine Ed Breitschwerdt of North Carolina State University has shown that these bacteria can infect humans and other mammals, and in turn, cause a variety of perplexing symptoms.