Proliferation of Argentine ants in California linked to decline in coastal horned lizards
...ed on the larger native ants rather than on other, harder to capture insects, have declined by 50 percent or more in areas where Argentine ants have invaded. "Although the biomass of Argentine ants is greater than the biomass of the native ants they've displaced, the horned lizards don't seem to want to...Remains of seven types of edible nuts and nutcrackers found at 780,000-year-old archaeological site
... softer shells and stone tools to crack those with harder shells. The tools the chimpanzees used have pits in them that resemble those in the stones found at Gesher Benot Yaaqov. The wide range of activities (hunting, gathering, tool-making, etc) performed at the site show that Gesher Benot Yaaqov was inha...Predators drive evolution of virtual prey appearance
... Edward Poulton had predicted in 1890: Since it's harder for a predator to search for two things at the sam...pearance) of insect prey might be that it makes it harder for the predator to find prey. "What's amazing is that it has taken this long to be able to put toge...Stanford researchers make lung cancer finging that could vastly improve treatment and outcome
...l give the clinician an incentive to look a little harder within this patient for additional tumors." To find out whether genetic differences exist between lung tumors, Garber obtained RNA from 67 lung tumor samples and six normal lung samples. RNA is produced by active genes and can be used to identify whi......ypotheses, but they need to be tested, and this is harder to do in mice or people than in flies. Because the lifecycle of the fly is so short, this method let us identify and test critical genes and eliminate the red herrings in a matter of weeks. Additionally, the long tradition of fly studies has given ...Leptin may hold key to better weight loss
...and increase appetite, two conditions that make it harder to fight the battle of the bulge. Prior research has shown that rats with diet-induced obesity and obese humans both have high levels of leptin. Giving more to them is minimally effective. The researchers in this study, therefore, gave obese rats a m...Science researchers report 'extremely unstable' gene expression in cloned mice
...oups to particular DNA nucleotides, makes the gene harder to transcribe and therefore lowers its expression levels. Degrees of methylation of H19 varied between the clones. Although most of the mice showed increased birth and placental weights, along with the changes in gene expression, the researchers...Climate change affecting even remote arctic environment, study says
...species populations and other basic parameters was harder than we had expected. I hope the Arctic Council will build on our work, both through further research that takes a circumpolar perspective and through actions that respond to the threats identified in the report." Using plain language and numerous m...Kyoto's global warming controls could harm forests
...g their ranges. The bad news is that it will be harder for trees and other species in today's fragmented and degraded forests to shift their ranges in response to climate change. To help forests adapt to climate change, Noss recommends two main approaches. First, we should maintain or restore conn...Proteins in African HIV strains interact differently with drugs
...e two subtypes of HIV prevalent in Africa, make it harder for inhibitory drugs to bind to the protease, a key protein involved in viral maturation, according to a new report by biologists in The Krieger School of Arts and Sciences of The Johns Hopkins University. Ernesto Freire , the Henry A. Walters profe...Monogamy appears to be unnatural in the natural world
Myths die hard. And it's even harder to dispel a myth when it concerns sexuality. But in a new book called "The Myth of Monogamy," a husband-wife scientific team contends that monogamy among animals, and humans in particular, may be the exception rather than the rule. David Barash, a...Chemistry of life in outer space is topic of two-day symposium, April 4-5
...ble conditions - making the "primordial soup" much harder to cook. Instead, researchers are investigating the likelihood that meteorites and dust from comets and asteroids brought water, gases and even organic compounds such as amino acids to Earth. These extraterrestrial hitchhikers may have "seede...Researcher finds that important fungal "scaffolding" genes belong to one of four classes
...sed by fungi. Worse, pathogenic fungi are becoming harder to kill, and the numbers of those with fungal disease in the U.S. have dramatically increased, according to the Centers for Disease Control. Momanys new research showed that the septins are not clustered in the A. nidulans genome but scattered throu......regions of HIV. As a result, it is expected to be harder for the virus to develop variants that can escape the vaccine-induced immune response." Strong cellular immunity is characteristic of long-term non-progressors or HIV-positive individuals who do not progress to AIDS for long periods even without anti...Genes don`t control human behavior, evolutionist says
...eate a utopia," Ehrlich concluded, "but by working harder to consciously influence cultural evolution we could do a lot better than we`re doing today."...European Parliament calls for action in epilepsy
...hat: 'The stigma associated with epilepsy is often harder to live with than the condition itself, impacting on many aspects of life, for example, employment. For years epilepsy has been ignored, and I believe this European White Paper on Epilepsy has come at the perfect time. Epilepsy remains notoriously ...Electrophysiological differences of individuals at high risk for alcoholism
...ted with the predisposition to alcoholism are much harder to find. Second, the finding of an increase in mismatch negativity makes the study of greater interest. Things that are not good to have - such as schizophrenia, attention deficit disorder, alcoholism, or a genetic vulnerability to schizophrenia ...Why monkeys don't hear as well as humans
...nd it creates noise. With this random noise, it's harder to hear an individual conversation." So that's what the average monkey is faced with - a lot more seashell-type roar going on in the little ears that blocks the outer ranges of sound. This explains the historic bank of data that indicates that monk...Baboon studies suggest strategies for coping with stress
...he excess. The result? The stress response becomes harder to turn off. Continued exposure to stress hormones can kill hippocampal cells, Sapolsky says. Stress-hormone levels are elevated in half of people suffering from major depression. Magnetic resonance imaging reveals shriveled hippocampal regions, wi......cially the mechanisms that allow birds to exercise harder than mammals at high altitude. His current research focuses on physiological acclimatization and genetic adaptations to chronic hypoxia, especially in the neural reflexes that control breathing in humans and other animals. A new research project thi...