The Rosetta space probe's long trek to Comet 67P/Churyumov-Gerasimenko
... has ever before been possible, for earlier probes simply flew past their targets. "As we will be accompanying Churyumov-Gerasimenko for two years, until the comet reaches its closest point to the Sun and travels away from it, we can at long last hope to acquire new knowledge about comets. We are confident...Research news from Tufts University, Friedman School of Nutrition Science and Policy: February 2004
...t natural levels. "Experiments have taught us that simply taking a natural product at any dose is not wise. Dose does count," says Russell. The lesson: more is not always better. For now, the best way to ensure an adequate intake of antioxidant nutrients, such as beta-carotene, is by eating five to nine s...Two-drug approach might shorten painful labor, reduce Caesarean sections
... short-term timely use," Sherwood said. "It would simply fill a late-term deficiency and would be safe." A regulatory hurdle, however, exists. Relaxin is not approved for use in humans. BAS Medical, a private company in California, recently purchased the rights to recombinant human relaxin. "It remains to ...Rare ant may help solve some mysteries of social evolution
...re even more highly evolved than slave-making ants simply because these queens seem to get by quite well on their own," Herbers said. "The fundamental question we hope to answer is what happens in an evolutionary sense as the interactions between parasites and hosts proceed over time." This summer, Herbers ...UF study: World shark attacks sink again, may signal long-term trend
...t explanation that comes to mind is that there are simply fewer sharks out there in the water," he said. "We know that shark populations have declined internationally because of overfishing." The overall downturn in the economy over the past several years may be another factor, resulting in fewer people...U. Chicago study overturns conclusion of historic human genome data
...ed by being reinserted randomly into the genome -- simply because scientists can map the direction of those genes (whether it left or joined the chromosome). The team looked at the "expected levels of traffic" by plotting pseudo genes -- those genes that lose their function after being duplicated and which ...Human migration tracked in Stanford computer simulation
...other individuals. Most of the mutations, however, simply disappeared due to chance. Those mutations that stayed in the population until the simulation ended showed one of two patterns. If the mutation appeared in a heavily populated area, it had a lower chance of surviving for many generations or reaching ...If we are what we eat, some lake fish are made of maple leaves
...ng more animal life in the lakes than if they were simply isolated water bodies," Pace concludes....Waste motor oil management may pose threat to health and the environment
... after 5,000 miles, so the oil needs to be changed simply because it gets dirty. Yet high efficiency filters exist now and are available to the public. "If the auto manufacturers put these on new cars and called for these at each oil change, the used oil volume could be reduced by half from the transportati...Are fish made of maple leaves?
...d webs allowing more animal life than if they were simply isolated water bodies," Pace concludes....Structure of a Nobel-prize winning molecule: Aquaporin
...ules, like water, can easily pass, but larger ones simply can't fit. And the strategic positioning of amino acid residues with hydrophilic or hydrophobic properties along the channel helps police the influx of molecules based on their affinity for water. While it seems two amino acid chains located in the m...Exxon Valdez oil spill impacts lasting far longer than expected, scientists say
...mpact on various plant and animal species. "These simply astounding findings have extremely important implications for environmental management," said principal investigator Dr. Charles H. Peterson, Alumni Distinguished professor of marine sciences at the University of North Carolina at Chapel Hill. "They ...Growing human organs on the farm
...uman cells could be separated from the animal ones simply by modifying existing cell-sorting machines. Providing the method really does produce normal human cells, they would not be rejected. And any stray animal cells would be killed off by the recipient's immune system. Of course, the idea of using part...Scientists discover how anthrax creates its deadly spores
...e spore.The first step is not to produce them, but simply to collect them all inone place and then re-pack them into a spore. Other accessory genescontain instructions for making regulatory proteins and enzymes, whichare tools the anthrax bacillus uses to construct its spore." Data from the study indicates ......disease." "It looks as though sensitive people are simply wired to respond to stress more strongly than resilient people," Naliboff said. "How someone reacts to stress seems to be more important than the stress itself in explaining why one person gets sick and one person doesn't." "This heightened stress re...Brain tumor growth requires abnormal neighbors
...'s clear from our findings that tumors do not form simply by losing both copies of the Nf1 gene," he explains. "If we figure out what external cues are necessary to trigger tumor growth, we could try to shut off that switch and stop tumors dead in their tracks without having to correct the underlying geneti...Non-lethal methods can resolve conflicts between bears and humans
... domesticated dogs on home properties. Some wolves simply tolerated the mild electronic shocks and continued to feed "There is no single solution for every situation but individuals and communities should be given a variety of options so they can tailor their responses to their needs and tolerances," Treves...Purdue biologists expose the inner workings of viral machine
...rs of an unusual viral family, in that they do not simply deposit their genetic material into the victim's cytoplasm, or interior, in order to create new virus particles. Most viruses can do so with relative impunity, but reovirus RNA has a double-stranded structure that a host could perceive as a threat. R...Alcoholics with antisocial personality disorder have blunted emotional reactivity
...o trouble a lot," he said. "Yet these individuals simply may not be as affected by the prospects of negative outcomes, and may in fact have problems inhibiting their behavior to avoid such outcomes. So, how are you going to provide treatment to antisocial alcoholics?" Future studies, he added, need to fo...New method of identifying and isolating stem cells developed
...atch what happened in the "chase," the researchers simply added tetracycline to the mouse food, and no more fluorescent protein was made in the skin. Those cells that rapidly divide soon diluted out their glow and became dim, whereas cells that slowly cycled - the putative stem cells - were the only ones le...