NASA’s Stardust spacecraft has downlinked its first images of comet Tempel 1, the target of a flyby planned for Valentine’s Day, Feb. 14. The images were taken on Jan. 18 and 19 from a distance of 26.3 million kilometers (16.3 million miles), and 25.4 million kilometers (15.8 million miles) respectively. On Feb. 14, Stardust will fly within about 200 kilometers (124 miles) of the comet’s nucleus. (more…)
*New map of the genetic code of endangered orangutans yields important new conservation tools and insights into evolution*
For the first time, scientists have mapped the genome–the genetic code–of orangutans. This new tool may be used to support efforts to maintain the genetic diversity of captive and wild orangutans. The new map of the orangutan genome may also be used to help improve our understanding of the evolution of primates, including humans.
Partially funded by the National Science Foundation, the orangutan study appears in the Jan. 27 issue of Nature. It was conducted by an international team of scientists led by Devin P. Locke of the Genome Center at Washington University. (more…)
*Amoebae increase survival odds through rudimentary form of agriculture; finding has implications for human diseases*
Some amoebae do what many people do. Before they travel, they pack a lunch.
In results of a study reported in the journal Nature, evolutionary biologists Joan Strassmann and David Queller of Rice University show that long-studied social amoebae Dictyostellum discoideum (commonly known as slime molds) increase their odds of survival through a rudimentary form of agriculture. (more…)
GAINESVILLE, Fla. — The difficult task of sorting and counting prized stem cells and their cancer-causing cousins has long frustrated scientists looking for new ways to help people who have progressive diseases.
But in a development likely to delight math teachers, University of Florida researchers have devised a series of mathematical steps that accomplishes what the most powerful microscopes, high-throughput screening systems and protein assays have failed to do — assess how rapidly stem cells and their malignant, stemlike alter egos increase their numbers. (more…)
*New University of Michigan research shows higher education, religion, income levels influence Arab American support of organ donation*
ANN ARBOR, Mich. – U.S. organ procurement organizations looking to increase donation rates among Arab Americans can turn to new University of Michigan Health System research for recruitment ideas.
U-M researchers identified various factors – from education and income levels to gender and religion – that may predict how members of this population view organ donation, says lead study author Aasim I. Padela, M.D., an emergency physician and a Robert Wood Johnson Foundation Clinical Scholar at the U-M Health System. (more…)
Images of the small, icy Uranus moon Miranda were particularly surprising. Since small moons tend to cool and freeze over rapidly after their formation, scientists had expected a boring, ancient surface, pockmarked by crater-upon-weathered-crater. Instead they saw grooved terrain with linear valleys and ridges cutting through the older terrain and sometimes coming together in chevron shapes. They also saw dramatic fault scarps, or cliffs. All of this indicated that periods of tectonic and thermal activity had rocked Miranda’s surface in the past. (more…)
Researchers from North Carolina State University have developed a new device that represents a significant advance for computer memory, making large-scale “server farms” more energy efficient and allowing computers to start more quickly. (more…)
Scientists at the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) have coaxed polymers to braid themselves into wispy nanoscale ropes that approach the structural complexity of biological materials. (more…)
