Researchers at the University of Texas Medical Branch at Galveston say that sexting may be the new "normal" part of adolescent sexual development and is not strictly limited to at-risk teens. The findings, published in the journal Pediatrics, are from the first study on the relationship between teenage sexting, or sending sexually explicit images to another electronically, and future sexual activity. The study results indicate that sexting may precede sexual intercourse in some cases and further cements the idea that sexting behavior is a credible sign of teenage sexual ...

We might love to reminisce and tell others about our extraordinary experiences — that time we climbed Mt. Kilimanjaro, got to taste a rare wine, or ran into a celebrity on the street — but new research suggests that sharing these extraordinary experiences may come at a social cost. The findings are published in Psychological Science, a journal of the Association for Psychological Science. "Extraordinary experiences are pleasurable in the moment but can leave us socially worse off in the long run," says psychological scientist and study author Gus Cooney of Harvard University. ...

Children's future writing difficulties can be identified before they even learn how to begin writing, according to a new study by Professor Phaedra Royle and Postdoctoral fellow Alexandra Marquis of the University of Montreal's School of Speech Language Pathology and Audiology. The researchers are interested in oral language skills and their impact on grammar and spelling learning. Their work shows that oral language is a good predictor of writing difficulties. "The more children are able to use verb tense in spoken language, the more easily they can learn written language," ...

Researchers from UCL, Stanford Engineering, Google, Chalmers and Mozilla Research have built a new system that protects Internet users' privacy whilst increasing the flexibility for web developers to build web applications that combine data from different web sites, dramatically improving the safety of surfing the web. The system, 'Confinement with Origin Web Labels,' or COWL, works with Mozilla's Firefox and the open-source version of Google's Chrome web browsers and prevents malicious code in a web site from leaking sensitive information to unauthorised parties, whilst ...

Scientists have taken pictures of the BRCA2 protein for the first time, showing how it works to repair damaged DNA. Mutations in the gene that encodes BRCA2 are well known for raising the risk of breast cancer and other cancers. Although the protein was known to be involved in DNA repair, its shape and mechanism have been unclear, making it impossible to target with therapies. Researchers at Imperial College London and the Cancer Research UK London Research Institute purified the protein and used electron microscopy to reveal its structure and how it interacts with ...

An international collaboration of scientists has identified a fifth of the genetic factors that cause height to vary between individuals. A study which examined data on DNA from more than 250,000 people, published on October 6 in Nature Genetics, roughly doubles the number of known genome regions involved in height to more than 400. It also revealed that more than half of the factors involved in determining height are explained by simple common genetic variation - the sort of genetic variation that exists in more than 1 in 10 people. The collaboration, co led by the ...

Researchers at University of California, San Diego School of Medicine have discovered that T-cells – a type of white blood cell that learns to recognize and attack microbial pathogens – are activated by a pain receptor. The study, reported online Oct. 5 in Nature Immunology, shows that the receptor helps regulate intestinal inflammation in mice and that its activity can be manipulated, offering a potential new target for treating certain autoimmune disorders, such as Crohn's disease and possibly multiple sclerosis. "We have a new way to regulate T-cell activation ...

Experiments in mice with a bone disorder similar to that in women after menopause show that a scientifically overlooked group of cells are likely crucial to the process of bone loss caused by the disorder, according to Johns Hopkins researchers. Their discovery, they say, not only raises the research profile of the cells, called preosteoclasts, but also explains the success and activity of an experimental osteoporosis drug with promising results in phase III clinical trials. A summary of their work will be published on Oct. 5 in the journal Nature Medicine. "We didn't ...

The largest genome-wide association study (GWAS) to date, involving more than 300 institutions and more than 250,000 subjects, roughly doubles the number of known gene regions influencing height to more than 400. The study, from the international Genetic Investigation of Anthropometric Traits (GIANT) Consortium, provides a better glimpse at the biology of height and offers a model for investigating traits and diseases caused by many common gene changes acting together. Findings were published online October 5 by Nature Genetics. "Height is almost completely determined ...

A 7-year-project to develop a barcoding and tracking system for tissue stem cells has revealed previously unrecognized features of normal blood production: New data from Harvard Stem Cell Institute scientists at Boston Children's Hospital suggests, surprisingly, that the billions of blood cells that we produce each day are made not by blood stem cells, but rather their less pluripotent descendants, called progenitor cells. The researchers hypothesize that blood comes from stable populations of different long-lived progenitor cells that are responsible for giving rise to ...

This news release is available in French and German. Physicians and researchers at CHU Sainte-Justine, Université de Montréal, CHU de Québec, Université Laval, and Hubrecht Institute have discovered a rare disease affecting both heart rate and intestinal movements. The disease, which has been named "Chronic Atrial Intestinal Dysrhythmia syndrome" (CAID), is a serious condition caused by a rare genetic mutation. This finding demonstrates that heart and guts rhythmic contractions are closely linked by a single gene in the human body, as shown in a study published on October ...

A new crystallographic technique developed at the University of Leeds is set to transform scientists' ability to observe how molecules work. A research paper, published in the journal Nature Methods on October 5, describes a new way of doing time-resolved crystallography, a method that researchers use to observe changes within the structure of molecules. Although fast time-resolved crystallography (Laue crystallography) has previously been possible, it has required advanced instrumentation that is only available at three sites worldwide. Only a handful of proteins ...

A study published in Nature Geoscience shows that air pollution has had a significant impact on the amount of water flowing through many rivers in the northern hemisphere. The paper shows how such pollution, known as aerosols, can have an impact on the natural environment and highlights the importance of considering these factors in assessments of future climate change. The research resulted from a collaboration between scientists at the Met Office, Centre for Ecology and Hydrology, University of Reading, Laboratoire de Météorologie Dynamique in France, and the University ...

The multitude of microbes scientists have found populating the human body have good, bad and mostly mysterious implications for our health. But when something goes wrong, we defend ourselves with the undiscriminating brute force of traditional antibiotics, which wipe out everything at once, regardless of the consequences. Researchers at Rockefeller University and their collaborators are working on a smarter antibiotic. And in research to be published October 5 in Nature Biotechnology, the team describes a 'programmable' antibiotic technique that selectively targets the ...

Type 2 diabetes affects an estimated 28 million Americans according to the American Diabetes Association, but medications now available only treat symptoms, not the root cause of the disease. New research from Rutgers shows promising evidence that a modified form of a different drug, niclosamide – now used to eliminate intestinal parasites – may hold the key to battling the disease at its source. The study, led by Victor Shengkan Jin, an associate professor of pharmacology at Rutgers Robert Wood Johnson Medical School, has been published online by the journal Nature ...

Montréal, October 2, 2014 – Scientists at the IRCM discovered a mechanism that promotes the progression of medulloblastoma, the most common brain tumour found in children. The team, led by Frédéric Charron, PhD, found that a protein known as Sonic Hedgehog induces DNA damage, which causes the cancer to develop. This important breakthrough will be published in the October 13 issue of the prestigious scientific journal Developmental Cell. The editors also selected the article to be featured on the journal's cover. Sonic Hedgehog belongs to a family of proteins that gives ...

Despite the legalization of same-sex marriage in 19 states and the District of Columbia and an executive order to prohibit federal contractors from discrimination against lesbian, gay, bisexual, and transgender employees, LGBT individuals face tremendous hurdles in access to health care and basic human rights. A special report published by The Hastings Center, LGBT Bioethics: Visibility, Disparities, and Dialogue, is a call to action for the bioethics field to help right the wrongs in the ways that law, medicine, and society have treated LGBT people. The editors are Tia ...

FALLS CHURCH, Va. (October 3, 2014) — A new National Institute for Occupational Safety and Health (NIOSH) study, published online in the Journal of Occupational and Environmental Hygiene, found that recommended safe handling practices for workers who administer antineoplastic drugs in healthcare settings are not always followed. Results are derived from the 2011 Health and Safety Practices Survey of Healthcare Workers, the largest federally-sponsored survey of healthcare workers in the U.S., which addresses safety and health practices relative to use of hazardous chemicals. ...

Men who consume more alcohol have a greater risk of human papillomavirus (HPV) infection, according to a recent study by Moffitt Cancer Center researchers. HPV is a common sexually transmitted virus, with more than six million new infections in the United States each year. HPV causes genital warts in both men and women and is a contributing factor to a number of different cancers in women, including cervical, vaginal and anal cancers. More recent studies have shown that HPV can also cause penile, anal and oropharyngeal cancer in men. However, there is limited data regarding ...

A snaking, extended filament of solar material currently lies on the front of the sun-- some 1 million miles across from end to end. Filaments are clouds of solar material suspended above the sun by powerful magnetic forces. Though notoriously unstable, filaments can last for days or even weeks. NASA's Solar Dynamics Observatory, or SDO, which watches the sun 24 hours a day, has observed this gigantic filament for several days as it rotated around with the sun. If straightened out, the filament would reach almost across the whole sun, about 1 million miles or 100 times ...

In response to the rise of drug-resistant pathogens, doctors are routinely cautioned against overprescribing antimicrobials. But when a patient has a confirmed bacterial infection, the advice is to treat aggressively to quash the infection before the bacteria can develop resistance. A new study questions the accepted wisdom that aggressive treatment with high drug dosages and long durations is always the best way to stem the emergence and spread of resistant pathogens. The review of nearly 70 studies of antimicrobial resistance, which was authored by researchers at Princeton ...

Two NASA satellites captured data on Typhoon Phanfone as it continues to strengthen as it moves through the Northwestern Pacific Ocean. The Tropical Rainfall Measuring Mission or TRMM satellite flew over Typhoon Phanfone on Oct. 2, 2014 at 0939 UTC (5:39 a.m. EDT). The rainfall pattern observed using TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) data showed that Phanfone was much better organized than a day earlier. This precipitation analysis revealed that intensifying typhoon Phanfone had formed a large eye. The heaviest rainfall was shown falling at a ...

NASA's Terra satellite spotted the birth of Tropical Storm Vongfong in the Northwestern Pacific Ocean on Oct. 3. Vongfong is the nineteenth tropical storm of the Northwestern Pacific typhoon season. The MODIS or Moderate Resolution Imaging Spectroradiometer instrument that flies aboard NASA's Terra satellite captured a visible image of Tropical Storm Vongfong on Oct. 3 at 00:30 UTC (Oct. 2 at 8:30 p.m. EDT). At the time of the image, the center of Tropical Storm Vongfong was located just to the northeast of Pohnpei, one of four states in the Federated States of Micronesia. ...

Tropical Storm Simon is following the path of several other tropical storms that formed in the Eastern Pacific Ocean by crawling northward along the western coastline of Mexico. NOAA's GOES-West satellite captured an infrared image of Simon on Oct. 3 that showed the eastern side of the storm over Mexico. An infrared image taken from NOAA's GOES-West satellite on Oct .3 at 7:45 a.m. EDT showed strong thunderstorms circling Tropical Storm Simon's center and a fragmented band of thunderstorms in Simon's eastern quadrant bringing rainfall to western Mexico. Simon's center ...

Scientists at the U.S. Department of Energy's Argonne National Laboratory have created a new model to more accurately describe the greenhouse gases likely to be released from Arctic peatlands as they warm. Their findings, based on modeling how oxygen filters through soil, suggest that previous models probably underestimated methane emissions and overrepresented carbon dioxide emissions from these regions. Peatlands, common in the Arctic, are wetlands filled with dead and decaying organic matter. They are the result of millions of years of plants dying and breaking down ...