On a quest to design an alternative to the two complex approaches currently used to produce electrons within microwave electron guns, a team of researchers has demonstrated a plug-and-play solution capable of operating in this high-electric-field environment with a high-quality electron beam.
Curbing the routine use of preventive antibiotics before dental work may have contributed to a rise in heart valve infections in England, a new study suggests. In the U.S., the highest-risk patients still get these drugs and no similar trend has been seen.
A study has found that children who were exposed to antibiotics in the second or third trimester of pregnancy had a higher risk of childhood obesity at age seven. The research also showed that, for mothers who delivered their babies by a Caesarean section— whether elective or non-elective— there was a higher risk for obesity in their offspring.
Seventy-four percent of parents would consider removing their kids from daycare if other children were unvaccinated, while 41 percent of parents say under-vaccinated kids should be excluded from daycare.
Leave it to long-dead short-tailed shrew and flying squirrels to outfox climate modelers trying to predict future habitats. Evidence from the fossil record shows that a gluttonous insect-eating shrew didn't live where a species distribution technique, drawn by biologists, put it 20,000 years ago to survive the reach of glaciers.
Determinants of health have traditionally been the concern of public health and have not been linked closely to clinical practice. However, if standardized social and behavioral data can be incorporated into patient electronic health records (EHRs), those data can provide crucial information about factors that influence health and the effectiveness of treatment.
The government has the power to hold drone operators accountable when they operate the remote-control aircraft recklessly, a federal safety board ruled today in a setback to small drone operators chafing under FAA restrictions.
A new computer model can identify unknown chemical mechanisms that could improve energy production and storage, or the development of new medicines.
Researchers have identified new evidence supporting the growing belief that Neanderthals were a distinct species separate from modern humans, and not a subspecies of modern humans. The research also indicates that the Neanderthals' extinction was likely because of competition from modern humans and not an inability to process a colder and drier climate.
Dismissed only a few years ago by residents of California's second-largest city, San Diego is joining other California cities that are taking a closer look at recycling wastewater for drinking as the state suffers from severe drought.
Over the objection of environmental groups and Virginia's governor, a federal management plan released today will allow a form of natural gas drilling known as fracking to occur in parts of the largest national forest on the East Coast.
Scientists will have to find alternative explanations for a huge population collapse in Europe at the end of the Bronze Age as researchers have proven definitively that climate change— commonly assumed to be responsible— could not have been the culprit.
Studies have suggested that the production of Higgs particles during the accelerating expansion of the very early universe should have led to instability and collapse. Now, a team has described how the space-time curvature– in effect, gravity– provided the stability needed for the universe to survive expansion.
Air tour operators at the Grand Canyon would be able to take more visitors over the most popular flight routes under a proposed incentive to make aircraft quieter. The incentive would apply to the Dragon and Zuni Point corridors, which provide views of the widest and deepest parts of the canyon to the eastern edge.
Triclosan is an antimicrobial commonly found in soaps, shampoos, toothpastes and many other household items. Despite its widespread use, researchers are reporting potentially serious consequences of long-term exposure to the chemical. Their study shows that triclosan causes liver fibrosis and cancer in laboratory mice through molecular mechanisms that are also relevant in humans.