Long thought extinct, ivory-billed woodpecker rediscovered in Big Woods of Arkansas
...view a video news release . BRINKLEY, Ark. - Long believed to be extinct, a magnificent bird - the ivory-billed woodpecker - has been rediscovered in the Big Woods of eastern Arkansas. More than 60 years after the last confirmed sighting of the species in the United States, a research team today announced th...Gene variants predict bleeding after heart surgery
...nection with post-surgical bleeding, the Duke team believed that multiple genes and their interactions may be involved. The researchers first selected 19 different polymorphisms of 13 candidate genes that past studies have shown have an effective on the blood's ability to clot. They then correlated genetic in...Researchers extend mouse lifespan by protecting against free radicals
...s on specific age-related diseases, because it was believed that the aging process itself could not be affected," Rabinovitch explained. "What we're realizing now is that by intervening in the underlying aging process, we may be able to produce very significant increases in 'healthspan,' or healthy lifespan."...Killer dinosaurs turned vegetarian
... was 90 million years old, so scientists initially believed the older therizinosaurs in China had migrated over a land bridge from Asia through Alaska to the American Southwest. But due to the constantly shifting plates of Earth's surface, Alaska didn't exist 125 million years ago the age of both Falcarius...Mechanism for the captation of nutrients in plants- unknown to date
...elevance is considerably inferior to what has been believed to date. In the absence of saccharose, nutrients can penetrate the cell by means of transporters, but the amount entering through this mechanism is less than that incorporated via endocitosis. Thus, the experiments carried out showed the existence of...Brain chemical serotonin involved in early embryo patterning, Forsyth scientists find
...demonstrates that a signaling mechanism previously believed to exist only in neuronal synapses is, in fact, also a signal used by communicating primitive embryonic cells--thus illustrating a fascinating re-use of cellular control systems in evolution. The mechanism can now be studied in a wide selection of or...As world warms, vegetation changes may influence extreme weather
...how vegetation responds to global warming. This is believed to be the first study to indicate that as vegetation responds to climate change, those changes in ground cover may affect where and how often extreme weather events occur. While climate scientists have theorized that this relationship exists, Diffenb...Fungus-farming termites descend from an African rain forest Eve
...on of human agriculture. Human agriculture is also believed to have originated in relatively favourable areas to which most domesticable plants and animals were native. From the homelands of domestication, agriculture has later spread to other regions, including to much more unfavourable areas. This occurred ...Certain fish have a special mating preference
...c female choice. That is, most evolutionists have believed that for animals with internal fertilization -- li... transfer sperm. Historically, genitalia were not believed to be subject to such sexual selection. "Male genitalia can be seen as just another morphol...UCLA cancer researchers shake loose hidden biomarker
...been proven before. Many researchers, in fact, had believed the opposite was true, Rajasekaran said. So discovering the mechanism of moving the PSMA to a more treatment accessible location on the cell could have ramifications for treating the sickest patients, those in whom the cancer has spread. "The ability...Waggle dance controversy resolved by radar records of bee flight paths
...oneybee worker discovers a good feeding site it is believed that she informs her nest mates through a dance that describes the distance and direction of the feeding site. This 'dance language' was first described by Karl von Frisch in the 1960s but his experiments also showed that bees that had attended the d...Counting cells in blood samples may predict cancer treatment's effectiveness
... the natural process of blood vessel formation, is believed to contribute to the growth and development of can...nhibitor in development at Abbott Laboratories, is believed to work by slowing or stopping the growth of blood vessels, thereby choking off a tumor's blood supp...Deeply held values fuel debate over offshore wind power
...ore Wind Power: Science, Engineering, and Policy," believed to be the first of its kind in the country. The scientists also have established a Web site on offshore wind power, with links to their recent research articles, wind maps, and other resources, at http://www.ocean.udel.edu/windpower ....More than 'SNARE' needed for proper synapse
...atter of debate for many years. Previously, it was believed that SNARE (soluble N-ethylmaleimidesensitive factor attachment protein receptor) proteins were all that was needed for this fusion. In this paper, Bellen and his colleagues argue that Vha100-1 is another component that together with the SNARES are c...Scripps scientists find potential for catastrophic shifts in Pacific ecosystems
...ntific basis for these polices." The new study is believed to be the first direct test for nonlinearity in large-scale physical and biological data for the marine environment. The basic methods for testing for linear and nonlinear signatures were developed by Sugihara over years of studying a variety of comp...Gene keeps neural cells on correct developmental path
...as heart, bone, and brain. At one time, scientists believed the differences among cell types arose from various sets of genes switched on inside developing cells. Then, studies showed that adult neurons uniquely lack a protein that permanently turns off neuronal genes in the rest of the body's cells. Now, it ...Lack of coherent cloning policies reflects polarized debate, limited understanding, study says
...hile slightly fewer than 10 percent indicated they believed it was not possible. When asked whether it was "scientifically possible today to produce a cloned human baby," only 18 percent correctly reported that it was not possible, while 38 percent indicated they didn't know. Slightly more than 45 percen...New polysaccharide may help combat multidrug resistance in cancer
...ls to several different chemotherapeutic drugs. He believed that the polysaccharide oligomers were binding to a receptor for hyaluronan (called CD44) and preventing it from initiating a signaling cascade that would result in drug resistance. "It is very surprising that hyaluronan is involved in drug resistan...Retina adapts to light changes by rewiring itself
... filtering process in the inner plexiform layer is believed to contribute to fundamental features of vision, such as sensitivity to light, temporal processing of motion, and detection of contrast. The new study by Jozsef Vigh, Ph.D., postdoctoral fellow at the Vollum and lead investigator, examined the retina...Scientists journey to southern Africa to unravel the secret world of elephant communication
...y interested in the elephant's feet and the trunk, believed to be the primary receptors of low-frequency vibrations. The trunk may be the most versatile appendage in nature. Its many uses include drinking, bathing, smelling, feeding and scratching. It turns out that the tip of the trunk contains two kinds pre...