New research proves single origin of humans in Africa
...f anatomically modern humans has been the focus of much heated debate. Our genetic research shows the further modern humans have migrated from Africa the more genetic diversity has been lost within a population. "However, some have used skull data to argue that modern humans originated in multiple spot...Jefferson scientist's patent dramatically improves
...rrent passes through. The researchers found, after much experimentation, that lithium boric acid would be a better buffer solution for the process than current 30-year-old methods. A process that normally takes around one and a half, two hours to do can be done in 10 minutes in some instances it can be...Nature's secrets yield new adhesive material
...rent under dry and wet conditions. It also adhered much longer under both extremes than previous gecko-based synthetic adhesives, a major issue in this area of research. According to the authors, their findings mark the first time that two polar opposite adhesion strategies in nature have been merged ...Ability to listen to 2 things at once is largely inherited, says twin study
...eople dont even realize they possess these skills, much less how adept they are at them. Auditory processi...lation among twins, especially identical twins. As much as 73 percent of the variation in dichotic listening ability was due to genetic differences, a magni...Bull's-eye -- Programs targeting math, science teacher shortage may get boost
...ence and math at other universities collaborate as much as those at UH, said Robert Wimpelberg, dean of the College of Education. The teachHOUSTON program is a natural extension of the things we already do so well together. Intensive mentoring is another program feature. The would-be teachers receiv...Malaria -- Effective insecticide-repellent synergy against mosquito vectors
...ponents. A combination of the two had proved to be much more effective than the straightforward addition of their respective properties. Mosquito nets soaked with this mixture had a lethal power and irritant effect that inhibited the mosquitoes from biting. Moreover, the mosquitoes are hit by a powerful p...Vaccine trials inject hope into koala's future
... chlamydia seems to be increasing," he said. "As much as 40-50 per cent of koalas coming into care in both Queensland and NSW are showing clinical signs of the disease and it seems to be getting worse." The vaccine will be administered to a small number of koalas via an injection either under the skin...Study identifies energy efficiency as reason for evolution of upright walking
...er, there was variability among chimpanzees in how much energy they used, and this difference corresponded to their different gaits and anatomy. We were able to tie the energetic cost in chimps to their anatomy, said Raichlen. We were able to show exactly why certain individuals were able to walk biped...Metabolic syndrome -- don't blame the belly fat
...uction, elevating triglycerides in the blood by as much as 60 percent and lowering HDL cholesterol (the go...d defect in muscle glycogen synthesis and diverted much more of their ingested carbohydrate into liver fat production, Shulman and his colleagues reported. ...Accident-prone? Scientists link brain function to knee injuries
..., Swanik noted. It's hard to say at this point how much we can alter these characteristics with training, but certainly the brain has great potential for learning and adaptation. Controlling stress and anxiety must be considered, as both cause changes in muscle tone and concentration and the narrowing of ...What determines the speed at which birds fly?
... evolutionary history of the species helps explain much of the variation in flight speed: species of the same group tend to fly at similar characteristic speeds. For example, birds of prey and herons had slow flight speeds, on average, given their mass and wing loading, whereas the average speed for songb...Microscopic jets, diamonds unlikely on Uranus, and amazing mosquito legs
...like Uranus, arrangements of carbon atoms would be much more suitable for creating tiny bits of graphite r...carbon atoms to line up in configurations that are much more amenable for diamond crystallization. The conclusion is consistent with the 2004 discovery of a...Clues to future evolution of HIV come from African green monkeys
...ncestor of green monkeys before the lineage split, much longer ago. "Studying SIV helps us learn more about HIV," said the paper's first author Joel Wertheim, a doctoral candidate in the UA department of ecology and evolutionary biology. "This finding sheds light on the future direction of HIV evolutio...Philadelphia ecologist receives top Mongolia honor
...at how beautiful and clean the lake was and at how much we still had to learn about this lake, said Goulden. In 1995, Goulden helped found The Institute of Mongolian Biodiversity and Ecological Studies to support research into the environmental and economic forces challenging the nation. Mongolia, which ...Gene discovered for type 1 diabetes in children
...e gene makes it more likely to happen. Although much research remains to be done, better understanding of the disease process may guide doctors to new and improved therapies. If we know the gene pathways that give rise to type 1 diabetes, we hope to intervene early in life with targeted drugs or cell t...Throwing motion in young baseball players may actually protect shoulder
...r says that the throwing shoulder does not lose as much external rotation. An adult will never have as much shoulder motion as a nine year-old, he explains. To evaluate the adaptive changes in the shoulder ...A new plant-bacterial symbiotic mechanism promising
... The plant thus acquires the possibility of fixing much higher quantities of nitrogen than those usually measured in leguminous plants which have nodules only on their roots. The researchers sequenced (3) the genes of two bacterial strains of Bradyrhizobium, ORS278 and BTAi1, in order to find out their g...Geologists witness unique volcanic mudflow in action in New Zealand
... through the bank ultimately caused it to collapse much sooner, on March 18, 2007. A lahar warning system had been installed at Mount Ruapehu, and was hailed a success after it successfully alerted officials to the onset of the lahar. In total, about 1.3 million cubic meters of water were released from ...EPA foregoes opportunity to improve nanotechnology oversight
...le to identify which substances are nanomaterials, much less determine whether they pose a hazard. Project on Emerging Nanotechnologies science advisor Andrew Maynard underlined that EPAs approach ignores the scientific research evidence to date that different nanostructures with the same molecular iden......self that is defined, or bracketed, by a boundary, much as words in a sentence are bracketed by punctuation marks. The researchers data suggest that repeated genomic sequences might be a widely used strategy used in mammals to organize functional domains. Without boundary elements, the coding portion o...