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Fire's Weird Behavior in Space

Fenella Saunders

In the microgravity environment of outer space, flames burn very differently than they do on Earth. Understanding those differences not only helps researchers grasp the properties of combustion and burning, but is also crucial for outer-space missions. Testing how materials ignite and smolder in microgravity is essential for choosing everything from windowpanes to wire insulation for the Space Station and potentially longer-term space missions to Mars or other destinations. A recent project on the Space Station, called BASS II (for Burning and Suppression of Solids), used the assistance of astronauts on the station to conduct controlled, contained experiments on a variety of flammable materials. Sandra L. Olson, the principal investigator of the mission at NASA Glenn Research Center in Cleveland, provided imagery of some of the results. Olson also co-authored a recent feature in American Scientist on a particular type of insidious slow-growing flame in microgravity called flamelets. She and her coauthors also participated in an American Scientist hangout on the research.

Videos and images courtesy of Sandra L. Olson and NASA.

(Use the button on the right to enter 'full screen mode' to view the images and captions at the same time.)


See the associated blog for more, including video.

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Audio: Dance -- It's Only Human

Katie L. Burke

Dancing is something we see in almost every human culture. But scientists think we're the only animals who synchronize our movements to music. To understand why, American Scientist’s Katie Burke spoke with two evolutionary psychologists who research how dancing helps us bond with other people. It turns out, what we get from dancing with one another is the same thing that chimpanzees get from grooming one another, which could help explain how our ancestors and our cultures evolved—to dance.



This story was produced in association with PRX with funding from the Alfred P. Sloan Foundation.

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Video: How Hair Ice Forms

Fenella Saunders

In 2013, American Scientist featured an article on odd ice formations on plant stems.

One of the types of ice discussed in the article was hair ice—long, thin strands of ice that grow under quite specific conditions. The only problem is that a new study shows the theory put forth at the time—that gas pressure pushes the water out—isn’t correct.

We asked Christian Mätzler, a physicist at the University of Bern in Switzerland, and the lead author of the study, to provide an update on the hair ice formation mechanism.

See the associated blog for a full transcript of the video.

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Slideshow: Where the Xingu Bends and Will Soon Break

Katie L. Burke, Barbara Aulicino

Mark Sabaj Pérez is an ichthyologist whose expertise includes photographing fish up close and in detail. In this slideshow, we wanted to showcase some of the stunning visuals from his recent feature, "Where the Xingu Bends and Will Soon Break," which serves as a biologist's ode to Brazil's Xingu River, where the controversial Belo Monte megadam is slated to go into operation soon, changing its extensive rapids and diverse habitats. The author has been working with a team of Brazilian and American scientists on the iXingu Project to document the biodiversity of the river before the dam is in operation.

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Audio Exclusive: Discussing Rare Desert Species with Author Christopher Norment

Dianne Timblin, Katie-Leigh Corder


2015-11NormentCoverClick to Enlarge ImageFor our very first Scientists' Nightstand podcast, author Christopher Norment joins us to discuss his book, Relicts of a Beautiful Sea: Survival, Extinction, and Conservation in a Desert World, from University of North Carolina Press. It tells the story of six rare desert species native to the Death Valley region. Along the way Norment considers practical and ethical questions about conservation, especially around the issues of water use and climate change. He offers an eloquent and personal take on evolutionary history, firmly grounded in ecological science, enlivened by closely observed detail. Relicts of a Beautiful Sea presents a convincing argument for biodiversity conservation.

Christopher Norment is professor and chair of the Department of Environmental Science and Biology at the State University of New York College of Brockport. He's the author of several books including In the Memory of the Map: A Cartographic Memoir from the University of Iowa Press. He spoke to us in Durham, North Carolina, while he was here to present a lecture and reading for the E. O. Wilson Biodiversity Days, an event presented by the E. O. Wilson Biodiversity foundation and Duke University's Nicholas School of the Environment.



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The Living World in Eight Mandalas

Katie-Leigh Corder, Sandra J. Ackerman, Barbara Aulicino

2015-09ArtsLabBabaianF3.pngClick to Enlarge ImageCaryn Babaian, an artist and a biology instructor, has found a visual format that encourages her students to see and think about the important interactions in biology. Here she explains why the mandala, a Buddhist or Hindu graphic symbol of the universe, lends itself so well to the teaching of biology.

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Moving Science Towards Open Access

Katie-Leigh Corder, Katie L. Burke

MichaelEisenPodcastClick to Enlarge Image

Open-access research papers continue to be a debate in the world of scientific publishing. Public Library of Science (PLOS) forged the pathway for the open-access publishers and continues to be regarded as a role model for the movement's successes and challenges.

Biologist Michael Eisen, who is also one of the founders of PLOS, along with his postdoc mentor and cofounder Pat Brown, was motivated to pursue open-access publishing after discovering that the scientific community did not own their own literature.

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What's Not to Like About Butterflies?

Katie L. Burke

2015-05SpotlightBurkeF1.jpgClick to Enlarge Image A snippet of conversation as associate editor Katie L. Burke interviews Erik Aschehoug about what he finds, and what others may find, compelling about his work to conserve the rare, cryptic Saint Francis satyr butterfly. Photo at right by Daisy Aschehoug.

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And Then They Were Gone: Egypt’s Disappearing Wildlife

Katie-Leigh Corder, Tom Dunne, Katie L. Burke

YeakelAnimationUsing fossils and depictions in ancient art, Justin Yeakel and his colleagues reconstructed the food web of larger-bodies mammals over the past 11,000 years. As the climate became more arid and human population densities increased, the mammalian food web of Egypt lost its redundancy as more animals became locally extinct. Most notably, midsized herbivores—such as gazelles and antelope that link to the most carnivores—declined.

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Expanding with the Cosmos

Katie-Leigh Corder, Fenella Saunders, Corey S. Powell

KosowskyImage1Click to Enlarge Image

Using the Atacama Cosmology Telescope (ATC), a 6.5-meter microwave collector in Chile, cosmologists are piecing together the early history of the known universe. In an exclusive American Scientist interview, Arthur Kosowsky—a member of the ATC team and a professor in the Department of Physics and Astronomy at the University of Pittsburgh—discusses how he is using ATC to reach back in time billions of years to search for gravitational waves that could verify inflation and reveal unprecedented details about how the cosmos was born.

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Total Records : 25


 

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