Walking sticks lost wings, then re-evolved them
... first example of a complex feature being lost and recovered much later in an evolutionary lineage," Whiting said. "Even though the wing is not physically there, the underlying genetics which construct wings appear to be conserved over evolutionary time. It suggests that complexity can be maintained over tens ...Medical devices safe, but could be safer with better regulation
...ied among 39 of these patients. P. aeruginosa was recovered in 32 infections, and exposure to a potentially contaminated bronchoscope may have had a role in the deaths of three critically ill patients. When the three contaminated bronchoscopes were identified and removed from service, P. aeruginosa levels re...Prehistoric NW Indians hunted fur seals of sustainable basis
...largest, consisting of more than 60,000 seal bones recovered from an Indian village buried by mudslides. The bones were recovered from layers dated between A.D.1100 and 1800. The Alaskan sample of seal bones was smaller and less ...Common pediatric anesthesia drugs cause brain damage and learning and memory problems in infant rats
...ommonly used in pediatric surgery. As the animals recovered from the anesthesia, the researchers divided them into three groups: One group was sacrificed the next day and their brains examined, a second group grew to be about a month old and a third group grew into adulthood. The latter two groups were tested...Methane and mini-horses: Fossils reveal effects of global warming
...state." But just because Earth and its inhabitants recovered from global warming in the past don't assume we have nothing to worry about now, Gingerich cautions. "In today's Earth, additional warming could set off a methane release that would bump the Earth's temperature up by several degrees---enough to melt ...Sudden removal of fat impairs immune function in rodents, biologists find
...nction four weeks after surgery but seemed to have recovered normal immune function 12 weeks after surgery, when they had regained normal levels of body fat. Demas attributed the different responses to the two species' unique physiologies. Demas said the study strengthens biologists' perception that immune sys...B-vitamins prove effective in relieving chronic pain
...ibited about 20-100 percent at 2, 6 and 12 hr, and recovered at 24 or 36 hr test dependent on different doses. Repetitive application of CBV for seven days produced long-term inhibitory effects on thermal hyperalgesia. The extreme sensitivity to stimuli disappeared four to five weeks after injury in rats wit...Water quality in Adirondack lakes responding to acid rain regulations
...t rates suggests that many lakes will not be fully recovered for several decades. "I don't want to give the impression that the job is done," Driscoll says, "but I think we can say with great confidence that if we cut emissions further, we'll get faster recovery."...Scientists returning to field of eerie thermal spires
...earchers also will grow and examine microorganisms recovered from the chimneys....Few microbiological differences in households using antibacterials
... were in use. The highest numbers of bacteria were recovered from kitchen sponges and from sink and bathtub drains. "In this one-time investigation of the microbiology of households, there was no significant difference in the numbers and kinds of bacteria found in those using or not using antibacterials," say...Mouse model offers new explanation for kidney disease and failure
...ly 7 percent of normal mice. And while normal mice recovered within two weeks, mice lacking one copy of CD2AP had more severe and persistent symptoms that were fatal in some of the animals. "Missing one copy of a gene is far more common than missing both copies, so the fact that animals who still have one heal...NIST advances in DNA analyses help Identify 9/11 victims
...tute of Justice. The matching of more than 20,000 recovered bone and tissue remains from the World Trade Center site with DNA samples provided by relatives of presumed victims is the largest DNA identification effort ever undertaken. Remains from about half of the approximately 2,800 victims were identified p...Public health measures can contain SARS, two modeling studies suggest
... susceptible (S), exposed (E), infectious (I), and recovered (R). Using the models, the researchers considered key factors that would influence the course of an epidemic, including how long the presymptomatic and infectious periods last, and how many new infections one infected person could cause. The Hong Ko...160,000-year-old fossilized skulls from Ethiopia are oldest modern humans
... from having been exposed for many years. The team recovered most pieces of the cranium, more than 200 in all, ... ritual, we have no way of knowing." The team also recovered more than 640 stone artifacts, though they estimate that the entire Herto area contains millions of ...Human stem cells improve movement in paralyzed rats
...paralyzed rats that got human stem cells partially recovered control of their hind limbs. Moreover, their hind limbs were 40 percent stronger than control animals'. By 24 weeks, 11 of the 15 turned over at least three seconds faster when placed on their backs than before getting the human cells. Control rats d...Stem-like cells from peripheral blood restore function in rats with severe stroke
...mpa, FL (July 7, 2003) -- Rats with severe strokes recovered function following intravenous injections of stem-like cells obtained from circulating human blood -- a finding that points to another potential cell therapy for stroke. The study, by researchers at the University of South Florida Center of Excellenc...Stanford symposium on future of air and space travel
...partment. While commercial air travel hasn't fully recovered from the aftermath of Sept. 11 and the economic downturn, he says, research advances over the next two decades may aid its restoration by making flying cheaper, safer and more reliable. ''Stanford's Department of Aeronautics and Astronautics has cons...Helping coral reefs survive climate change
...es C to 29 degrees C within days, and corals there recovered better than elsewhere in the country. In addition, corals that emerge at low tides may be more tolerant of heat stress. For instance, in Palau's Rock Islands, the reef flats that emerge during the low tide were bleached less than the parts of the re...Bones from French cave show Neanderthals, Cro-Magnon hunted same prey
... and teeth from large hoofed mammals that had been recovered from the cave. The animals ungulates such as reindeer, red deer, roe deer, horses and chamois were the most common prey were the mainstay of humans in this part of the world, according to Grayson. He and Delpech found a remarkable dietary simi...... costs of developing or distributing a drug can be recovered from the sale of the drug in the United States....