Indigenous hunter-gatherers and immigrant farmers lived side-by-side for more than 2,000 years in Central Europe, before the hunter-gatherer communities died out or adopted the agricultural lifestyle. The results come from a study undertaken by the Institute of Anthropology at Johannes Gutenberg University Mainz (JGU) that has just been published in the eminent journal Science. A team led by Mainz anthropologist Professor Joachim Burger studied bones from the 'Blätterhöhle' cave near Hagen in Germany, where both hunter-gatherers and farmers were buried. "It is commonly ...

In the land of 10,000 lakes, one lake has been the starting place for research with implications for big lakes around the world. According to a study published online this week in Science, University of Minnesota researchers, building from studies of nitrogen levels in Lake Superior, uncovered a good news/bad news scenario for lake health that has long-term, global implications for pollution control efforts. While many water-quality cleanup efforts focusing on the reduction of phosphorus have been highly effective, that success can also result in a decrease in microbial ...

ANN ARBOR, Mich. — "Sticks and stones may break my bones, but words will never hurt me," goes the playground rhyme that's supposed to help children endure taunts from classmates. But a new study suggests that there's more going on inside our brains when someone snubs us – and that the brain may have its own way of easing social pain. The findings, recently published in Molecular Psychiatry by a University of Michigan Medical School team, show that the brain's natural painkiller system responds to social rejection – not just physical injury. What's more, people who ...

Normally muscles contract in order to support the body, but in a rare condition known as cataplexy the body's muscles "fall asleep" and become involuntarily paralyzed. Cataplexy is incapacitating because it leaves the affected individual awake, but either fully or partially paralyzed. It is one of the bizarre symptoms of the sleep disorder called narcolepsy. "Cataplexy is characterized by muscle paralysis during cognitive awareness, but we didn't understand how this happened until now, said John Peever of the University of Toronto's Department of Cell & Systems Biology. ...

WASHINGTON—Research conducted by the National Geographic Genographic Project, a multiyear global initiative that uses DNA to map the history of human migration, is helping unravel the timing and source of human settlement in Central Europe. New ancient-DNA research led by the National Geographic Society's Genographic Project, the Australian Centre for Ancient DNA (ACAD) and researchers from the University of Mainz in Germany and the State Heritage Museum in Halle (Germany) showed a pattern of genetic replacement taking place across several millennia in a region of central ...

Cambridge, Mass. – October 10, 2013 – Thirty-eight U.S. national parks are experiencing "accidental fertilization" at or above a critical threshold for ecological damage, according to a study published in the journal Atmospheric Chemistry and Physics and led by Harvard University researchers. Unless significant controls on ammonia emissions are introduced at a national level, they say, little improvement is likely between now and 2050. The environmental scientists, experts in air quality, atmospheric chemistry, and ecology, have been studying the fate of nitrogen-based ...

A discovery at Rice University aims to make vehicles that run on compressed natural gas more practical. It might also prolong the shelf life of bottled beer and soda. The Rice lab of chemist James Tour has enhanced a polymer material to make it far more impermeable to pressurized gas and far lighter than the metal in tanks now used to contain the gas. The combination could be a boon for an auto industry under pressure to market consumer cars that use cheaper natural gas. It could also find a market in food and beverage packaging. Tour and his colleagues at Rice and ...

A novel device that uses only sunlight and wastewater to produce hydrogen gas could provide a sustainable energy source while improving the efficiency of wastewater treatment. A research team led by Yat Li, associate professor of chemistry at the University of California, Santa Cruz, developed the solar-microbial device and reported their results in a paper published in the American Chemical Society journal ACS Nano. The hybrid device combines a microbial fuel cell (MFC) and a type of solar cell called a photoelectrochemical cell (PEC). In the MFC component, bacteria ...

Ecologists conducting field research usually study areas that they hope won't be disturbed for a while. But in an article published in the November issue of BioScience, "Mapping the Design Process for Urban Ecology Researchers," Alexander Felson of Yale University and his colleagues describe how ecologists can perform hypothesis-driven research from the start of design through the construction and monitoring phases of major urban projects. The results from such "designed experiments" can provide site-specific data that improve how the projects are conceptualized, built ...

HONOLULU, October 11, 2013 — Young children whose parents used an integrated personal health record were more likely to attend six or more of the nationally recommended well-child care visits by 15 months of age, according to a Kaiser Permanente study published today in The Journal of Pediatrics. Using any Web-enabled device, PHRs allow patients to view parts of their medical record, including immunizations and after-visit instructions, manage appointments, refill prescriptions, check lab results, and securely communicate with their health care providers. In this retrospective ...

Consumers of natural health products beware. The majority of herbal products on the market contain ingredients not listed on the label, with most companies substituting cheaper alternatives and using fillers, according to new research from the University of Guelph. The study, published today in the open access journal BMC Medicine, used DNA barcoding technology to test 44 herbal products sold by 12 companies. Only two of the companies provided authentic products without substitutions, contaminants or fillers. Overall, nearly 60 per cent of the herbal products contained ...

Philadelphia, PA, October 11, 2013 – In the United States, children don't eat enough fruits, vegetables and whole grains. Instead, their diets typically include excessive amounts of sugars and solid fats, counter to the 2010 Dietary Guidelines for Americans recommendations, increasing the risk of obesity and diabetes. A team of investigators implemented a two-year intervention study in low-income, rural areas where a disproportionately higher risk of overweight and obesity habits among children persists, leading to increased risk of diabetes and heart disease in adulthood. ...

New York, NY— U.S. medical schools have made significant progress to strengthen their management of clinical conflicts of interest (CCOI), but a new study demonstrates that most schools still lag behind national standards. The Institute on Medicine as a Profession (IMAP) study, which compared changes in schools' policies in a dozen areas from 2008 to 2011, reveals that institutions are racing from the bottom to the middle, not to the top. In 2011, nearly two-thirds of medical schools still lacked policies to limit ties to industry in at least one area explored, including ...

Bethesda, MD -- New estimates released 9/18/13 from the Office of the Actuary at the Centers for Medicare and Medicaid Services (CMS) project that aggregate health care spending in the United States will grow at an average annual rate of 5.8 percent for 2012-22, or 1.0 percentage point faster than the expected growth in the gross domestic product (GDP). The health care share of GDP by 2022 is projected to rise to 19.9 percent from its 2011 level of 17.9 percent. The findings appeared as a Health Affairs Web First article, which is published in the October issue. The article ...

Amsterdam, NL, 9 October 2013 – According to the Parkinson's Disease Foundation, up to 60% of individuals with Parkinson's disease (PD) exhibit mild to moderate depression, which is often underdiagnosed. It is unclear whether depression results from having a debilitating disease or reflects a parallel abnormal change in the brain caused by PD pathophysiology. One hypothesis is that depression in PD may reflect impaired striatal dopamine function, but previous investigations have produced contradictory results. By scanning the brains of newly diagnosed patients not yet ...

Heart-breaking accounts of cyber bullying and suicide seem all too common, but a new study offers hope that social media can become an early warning system to help prevent such tragedies. Researchers at Brigham Young University examined tweets originating from all 50 states over a three month period. Sifting through millions of tweets, their algorithms searched for direct discussion of suicide, as well as keywords and phrases associated with known risk factors such as bullying. "With social media, kids sometimes say things that they aren't saying out loud to an adult ...

One of the most important proteins implicated in cancer is p53, which binds to DNA to regulate the activity of a large number of genes. In a study published by Cell Press October 10th in the journal Cell, researchers have identified a DNA sequence variation in a p53-binding site that is more prevalent in Caucasians than in Africans and is associated with a very large risk of testicular cancer but may protect light-skinned individuals against harmful ultraviolet rays. The study offers novel insights into the evolution of DNA sequence variations in p53-binding sites, and ...

Research has shown that exercise is good for the brain. Now investigators have identified a molecule called irisin that is produced in the brain during endurance exercise and has neuroprotective effects. Researchers were able to artificially increase the levels of irisin in the blood to activate genes involved in learning and memory. The findings, published online October 10 in the Cell Press journal Cell Metabolism, may be useful for designing drugs that utilize this exercise-induced molecule to guard against neurodegenerative diseases and improve cognition in the aging ...

Human skin must cope with UV radiation from the sun and other harmful environmental factors that fluctuate in a circadian manner. A study published by Cell Press on October 10th in the journal Cell Stem Cell has revealed that human skin stem cells deal with these cyclical threats by carrying out different functions depending on the time of day. By activating genes involved in UV protection during the day, these cells protect themselves against radiation-induced DNA damage. The findings could pave the way for new strategies to prevent premature aging and cancer in humans. ...

When people want to direct the attention of others, they naturally do so by pointing, starting from a very young age. Now, researchers reporting in Current Biology, a Cell Press publication, on October 10 have shown that elephants spontaneously get the gist of human pointing and can use it as a cue for finding food. That's all the more impressive given that many great apes fail to understand pointing when it's done for them by human caretakers, the researchers say. "By showing that African elephants spontaneously understand human pointing, without any training to do so, ...

You might not know it, but most of us are infected with the herpesvirus known as Epstein-Barr virus (EBV). For most of us, the virus will lead at worst to a case of infectious mononucleosis, but sometimes, and especially in some parts of the world, those viruses are found in association with cancer. Now, researchers reporting in the Cell Press journal Cell Reports on October 10 have found that the difference between a relatively harmless infection and a cancer-causing one lies at least partly in the viral strain itself. The results offer some of the first evidence for ...

October 10, 2013 – (BRONX, NY) – Our ability to detect heat, touch, tickling and other sensations depends on our sensory nerves. Now, for the first time, researchers at Albert Einstein College of Medicine of Yeshiva University have identified a gene that orchestrates the crucially important branching of nerve fibers that occurs during development. The findings were published online today in the journal Cell. The research focuses on dendrites, the string-like extensions of sensory nerves that penetrate tissues of the skin, eyes and other sensory organs. "The formation ...

October 10, 2013, New York, NY and Oxford, UK – A Ludwig Cancer Research study published in Cell today identifies a common mutation that dramatically increases the risk for testicular cancer—and describes a likely molecular mechanism by which it exerts that effect. The researchers also suggest why, despite its potential lethality, the genetic variation has been favored by natural selection to become common in light-skinned people. It appears this mutation might aid the tanning of Caucasian skin in response to sunlight, protecting it from UV radiation, which can burn and ...

High body weight in children and adolescents is strongly associated with the likelihood of hypertension, according to a Kaiser Permanente Southern California study published today in The Journal of Clinical Hypertension. Researchers found that young people who are overweight are twice as likely as their normal-weight peers to have hypertension; moderately obese youths have four times higher risk; and extremely obese children and adolescents are 10 times more likely to have hypertension. The study also found 10 percent of youths who are extremely obese have hypertension ...

In a Neuron article published online October 10th, recent Nobel Laureate Thomas C. Südhof challenges long-standing ideas on how neurotransmitter gets released at neuronal synapses. On October 7th, Südhof won the Nobel Prize in Physiology or Medicine, alongside James Rothman and Randy Schekman, for related work on how vesicles—such as those in neurons that contain neurotransmitter—are transported within cells. Neurotransmitter-containing vesicles are found inside neurons very close to the end of the axon. Here, they can quickly fuse with the neuronal membrane surrounding ...