Climate change plus human pressure caused large mammal extinctions in late Pleistocene
...al period 20,000 years ago. "This is a very clear case of climate-caused extinction without the significa...se great megafauna extinctions, Barnosky said. The case in South America is still muddled, he noted, but there, too, human incursions combined with climate ...Belgian researchers explore revolutionary approach to angiogenesis
...id was to use a an endolthelin antagonist in this case a cyclic peptide called BQ123 to target selectively one of the ET receptors, ET-A, that we found was particularly dense in the tumour arterioles. This peptide completely wiped out the ability of the arterioles to contract and kept them wide open. We...New Arizona State center brings science to policy on issues of water resources and urban growth
...mmitment to research with a purpose, which in this case is ensuring a sustainable future for our desert regions," said Arizona State University President Michael M. Crow. "ASU's expertise in climate science, water usage, science and technology policy, and our studies on the effects of urban growth all com...Marijuana use could cause tubal pregnancies
...t is not known whether drugs that block or, in the case of marijuana, over-stimulate the CB1 receptor can cause ectopic pregnancy in humans. However, "our results raise caution for women of reproductive ages regarding the chronic use of marijuana for recreation or pain alleviation," the researchers conclu...'Smart antibiotics' may result from UCLA research
...arger proteins," he said. As is often the case in science, the project was initially undertaken for an unrelated reason. Minghsun Liu, a former UCLA M.D.-Ph.D. student in Miller's laboratory, was looking for bacterial viruses to study genetics when he found a remarkable property in a particular v......epertoire. Though their approach hasn't closed the case on the mysteries of movement, it could help explain why we settle for a particular, non-silly walk. ...New sign language suggests children create language's fundamentals through learning
...ding to Senghas and her colleagues, the Nicaraguan case shows that it is. Senghas' coauthors are Sotaro Kita of the University of Bristol in Bristol, England and Asl zyrek of Nijmegen University and Max Planck Institute for Psycholinguistics in Nijmegen, The Netherlands and of Ko University in Istanbul, T...Simian virus 40 not associated with non-Hodgkin lymphoma, study shows
...s-like particles--was detected in 7% to 10% of NHL case patients and 10% to 11% of control subjects. When ...und SV40-specific antibody in less than 2% of both case patients and control subjects. The researchers thus found no association between SV40 exposure or in...Peering inside the body, with a new spinliterally
...shable peaks and valleys appear, the peaks in this case representing previously unseen biochemical compoun...in muscle and organs. His spinning subject in this case was raw (and very dead) rabbit flesh. He also has taken disembodied mouse livers and brains for slow...Pioneering AIDS researcher to speak at UH
...pidemic in China, where estimates expect the total case load to reach 10 million infected with HIV by 2010. Ho will talk about a DNA vaccine that has already reached phase-I human trial, as well as discuss two more vaccines under development. These vaccines under development are based on a viral strain...The birth of reproductive health: A difficult delivery
...tives and liberals is clearest, she argues, in the case of the US. Although it spends more than any other country on reproductive health--$429 million this year--the money comes with strings attached. For example, under the Mexico City Policy (the "Global Gag Rule"), which George W. Bush reinstated in ...New evidence of radiation risk in childhood leukaemia
...ted to further generations, as has shown to be the case in our mouse studies." Dubrova will be discussing the potential implications of his results for the estimates of genetic risk for humans. During the week long conference, there will be many presentations of new data as well as fresh reviews of ol...Genetic map of important tree genes outlined
... determining an animal or plant's function in the case of a tree, forming its bark, leaves, roots and wood, and enabling it to respond to environmental stresses. The study also compared many of these gene sequences to those found in Arabidopsis, and found that nearly all the genes were functionally comm...Long-term effects of carbon monoxide poisoning are an autoimmune reaction
...eeks later in half of the patients with a serious case of CO poisoning. The physiological causes of this delayed decline were not well understood until now. A team led by Stephen R. Thom, MD, PhD, Professor of Emergency Medicine and Chief of Hyperbaric Medicine, at the University of Pennsylvania School o...Identifying tick genes could halt disease, bioterrorism threat
...female needs the blood to nourish her eggs. In the case of Lyme disease-carrying deer ticks, the larvae feed on infected white-footed mice and other small mammals that harbor the pathogens. The tick develops into a nymph, which carries the Lyme disease-producing bacteria to people, pets and other animal s...Optimizing protein's 'death domain' halts leukemia in laboratory study
...na-Farber, co-senior author of the paper. "In this case we took the critical killer domain out of a pro-death molecule and chemically reinforced it, so we were able to get it into cancer cells and kill them." Loren D. Walensky, MD, PhD, of Dana-Farber and Children's Hospital Boston is the paper's first au...Analysis fingers causes of desertification
...Cover Change International Project, considered 132 case studies of dryland degradation. The results challenge single-factor explanations that put the most of the blame for desertification on the rural poor and nomadic populations. Nor do the results support the notion that desertification is the result of...Essential smell gene may provide key to new insect repellents
...avigate by smell to find food, mates and -- in the case of disease-spreading mosquitoes -- humans to bite. Researchers at Rockefeller University report in the September 2 issue of Neuron that insects' ability to detect odors depends on a single gene. Fruit flies lacking the gene, known as Or83b, cannot sm...Entrepreneurs to be told how nature's secrets can improve business
... "What we say to entrepreneurs is: use our case history to develop your business. There are millions of years of research that can help us, in nature. And Biomimetics is still such a new area of technology transfer that enormous opportunities exist for people to make discoveries and transform thes...Veterinarians discover first known case of canine distemper in a wild tiger
...ation Society (WCS) have confirmed the first-known case of canine distemper in a wild Siberian tiger in the Russian Far East, further threatening populations of this highly endangered big cat. Kathy Quigley, veterinarian for the WCS Siberian Tiger Project, confirmed that an adult female tigress that wande...