A fateful pause: Genetic mechanism once thought rare may allow rapid cell production
A healthy mind makes a healthy body in teens
We take our blood for granted, but its creation requires a complicated series of steps, starting with the formation of blood stem cells during early embryonic development, followed by progressive differentiation into the progenitors of red cells, white cells and platelets, and ultimately the full set of blood cells. Now, in the July 9 issue of Cell, researchers at Children's Hospital Boston report...
Alternative evolution: Why change your own genes when you can borrow someone else's?
Happier youths are also healthier youths, according to Emily Shaffer-Hudkins and her team, from the University of South Florida in the US. Adolescents' positive emotions and moods, as well as their satisfaction with life, could be more important than their anxiety or depression levels for predicting their physical health, they argue. Looking at teenagers' so-called 'subjective well-being' could...
Citizen journalism v. legacy news: The battle for news supremacy
It has been a basic principle of evolution for more than a century that plants and animals can adapt genetically in ways that help them better survive and reproduce.
Computer imaging that aids science
A team of researchers from the University of Missouri School of Journalism and two other schools say that even the top 60 citizen websites and bloggers are not filling the information shortfall that has resulted from cutbacks in traditional media.
Dig discovers ancient Britons were earliest North Europeans
Miriah Meyer isn`t a biologist, but she helps biologists better understand their work.
DNA discovery opens new door to develop tools, therapies for hereditary cancers (w/ Video)
(PhysOrg.com) -- A University College London archaeologist is part of a team who have unearthed the earliest evidence of human occupation in Britain.
Egypt unveils discovery of 4,300-year-old tombs
By solving the three-dimensional structure of a protein involved in repairing DNA errors, a group of McMaster University researchers have revealed new avenues to develop assessment tools and alternative treatments for people living with hereditary colorectal cancers.
Fireflies blink in synch to send a uniform message (w/ Video)
Egyptian archaeologists on Thursday unveiled a newly-unearthed double tomb with vivid wall paintings in the ancient necropolis of Saqqara near Cairo, saying it could be the start for uncovering a vast cemetery in the area.
France, Netherlands seek to halt Internet censorship
For decades, scientists have speculated about why some fireflies exhibit synchronous flashing, in which large groups produce rhythmic, repeated flashes in unison - sometimes lighting up a whole forest at once. Now, the first experiments on the function of this phenomenon suggest that synchronous flashing preserves female fireflies' recognition of suitable mates. The results are reported in the...
Functional MRI may predict response of hepatocellular carcinoma to chemoembolization
France and the Netherlands called Thursday for international guidelines to prevent private firms from exporting high-tech equipment that could be used for Internet censorship.
Geoscientists find clues to why first Sumatran earthquake was deadlier than second
A research team from United States investigated whether intra-procedural diffusion-weighted magnetic resonance imaging can predict response of hepatocellular carcinoma (HCC) during transcatheter arterial chemoembolization (TACE). Their results indicated that intra-procedural apparent diffusion coefficient changes of > 15 percent predicted 1-mo anatomical HCC response with the greatest accuracy,...
Heat waves could be commonplace in the US by 2039, Stanford study finds
An international team of geoscientists has uncovered geological differences between two segments of an earthquake fault that may explain why the 2004 Sumatra Boxing Day Tsunami was so much more devastating than a second earthquake generated tsunami three months later. This could help solve what was a lingering mystery for earthquake researchers.
HIV gains at risk as nations and global organizations retreat on funding and resource commitments
Exceptionally long heat waves and other hot events could become commonplace in the United States in the next 30 years, according to a new study by Stanford University climate scientists.
Instant testing for sore throats wins CIMIT prize
In a policy report published in Science, an internationally recognized peer-reviewed journal, leading experts in HIV/AIDS research have warned that failure to meet a pledge for universal access to HIV therapy and funding cuts to prevention and treatment programs are poised to deliver a major setback in the fight against HIV/AIDS.
Intercellular communication: From 'cable-phone' to 'cell-phone'?
Imagine finding out before you leave the pediatrician's office if your child has strep throat, or even something more serious requiring a different treatment. A novel application for applying DNA "nanobarcodes" in a clinical assay could help primary-care physicians quickly and more accurately determine what's causing a patient's acute pharyngitis from an easy throat swab.
La Nina developing, could mean more hurricanes
Secreted microRNAs (miRNAs) from cells to blood maybe the novel class of signaling molecules mediating intercellular/interorgan communication. A research article, published this week in Molecular Cell, reports that miRNA can be secreted from one type of cells and delivered into recipient cells, decreases targeted gene expression, thus, regulates recipient cell function.
Luteolin stars in study of healthful plant compounds
(AP) -- The climate phenomenon known as La Nina appears to be developing, threatening more bad news in the efforts to clean up the oil spill in the Gulf of Mexico.
Magnets trump metallics: Magnetic fields can block conductivity of carbon nanotubes
Natural compounds in plants may protect us against unwanted inflammation. However, human nutrition researchers agree that many questions remain about exactly how these compounds, known as phytochemicals, do that. Studies led by Agricultural Research Service (ARS) molecular biologist Daniel H. Hwang are providing some of the missing details.
Mathematics + Supercomputers = Big Bang Explained
Metallic carbon nanotubes show great promise for applications from microelectronics to power lines because of their ballistic transmission of electrons. But who knew magnets could stop those electrons in their tracks?
Origins of multicellularity: All in the family
(PhysOrg.com) -- Mathematician Daniel Reynolds is using supercomputers to unravel the mysteries of the Big Bang.
Rainy forecast douses plans to view Easter Island eclipse
One of the most pivotal steps in evolution-the transition from unicellular to multicellular organisms-may not have required as much retooling as commonly believed, found a globe-spanning collaboration of scientists led by researchers at the Salk Institute for Biological Studies and the US Department of Energy's Joint Genome Institute.
Rosetta lines up for spectacular asteroid flyby
Easter Island will be overcast and drizzly Sunday, weather experts said -- a disappointing forecast for thousands hoping to view what would be, if the weather cooperates, a spectacular solar eclipse.
Scientists find antibodies that prevent most HIV strains from infecting human cells
(PhysOrg.com) -- On 10 July, ESA's Rosetta will fly past 21 Lutetia, the largest asteroid ever visited by a satellite. After weeks of manoeuvres and a challenging optical navigation campaign, Rosetta is perfectly lined up to skim by at 3162 km at 18:10 CEST.
Study confirms that methadone works and saves lives for injecting drug users
Scientists have discovered two potent human antibodies that can stop more than 90 percent of known global HIV strains from infecting human cells in the laboratory, and have demonstrated how one of these disease-fighting proteins accomplishes this feat. According to the scientists, these antibodies could be used to design improved HIV vaccines, or could be further developed to prevent or treat HIV...
Research carried out by the universities of Bristol, Cambridge and Edinburgh found that opiate substitution treatment reduced the frequency of drug use and led to a drop in the risk of death by 13 per cent each year.