It isn't obvious that sign language, gestures to replace hearing words, would have regional dialects - accents - but it is so, according to Jami Fisher, a lecturer in the University of Pennsylvania's Department of Linguistics, who is working on a project to document what they're calling the Philadelphia accent of this language.

What differentiates one region of American Sign Language from other such dialects? Why do those in the deaf community have an intuition that it's different? And how could scientists understand the regional variation?

PHILADELPHIA - For years, researchers have noted a tantalizing link between some neurologic conditions and certain species of the herpes virus. In patients with Alzheimer's disease, multiple sclerosis, and cerebellar ataxia, among other neuropathies, the cerebrospinal fluid teems with Epstein-Barr virus (EBV). Yet, the nature of that link has remained unclear, as it has been assumed that EBV, as well as other viruses in the same sub-family, called gammaherpesviruses, cannot infect neurons.

The first mention of the bagel is in a 1610 text in a sumptuary law from the city of Krakow but in the late 19th century doughnut-shaped bread and smoked meat became popular in the New World thanks to successive waves of Jewish immigrants from Eastern Europe.

Why did Jews take up bagels in the first place?

"The addition of other ingredients besides flour and water makes them something other than bread," explains Olivier Bauer, a professor at the University of Montreal's Faculty of Theology and Religious Studies. "So Kashrut allows Jews to buy them and eat them right away without performing the ritual blessing over bread."

Astronomers discovered a nest of monstrous baby galaxies 11.5 billion light-years away and they speculate that the galaxies seem to reside at the junction of gigantic filaments in a web of dark matter. 

Since dark matter is the umbrella term for matter that inference says must exist but which has never been detected, how can they know the galaxies are surrounded by it? Read on. Thugh things are relatively quiet now, ten billion years ago, long before the Sun and Earth were formed, areas of the Universe were inhabited by monstrous galaxies with star formation rates hundreds or thousands of times what we observe today in our Milky Way galaxy.

Can you trust any Yelp review when some restaurants create fake online restaurants as portals to avoid their own bad reviews, or pay for good ones? 

And as organizations like the American Council on Science and Health quickly learned, when a cabal of anti-science groups, like SourceWatch, US Right To Know, Natural News, and Joe Mercola team up with Mother Jones to undermine your work, the public will rightfully only look skin deep and not realize the negative press is being manufactured.

CHICAGO - Obese people who lose a substantial amount of weight can significantly slow the degeneration of their knee cartilage, according to a new MRI study presented today at the annual meeting of the Radiological Society of North America (RSNA).

Obesity is a major risk factor for osteoarthritis, a degenerative joint disease that affects more than a third of adults over the age of 60, according to the Centers for Disease Control and Prevention. The knee joint is a common site of osteoarthritis, and in many people the condition progresses until total knee replacement becomes necessary. Aging baby boomers and a rise in obesity have contributed to an increased prevalence of knee osteoarthritis.

CINCINNATI--Pre-existing asthma may be a strong predictor of future chronic migraine attacks in individuals experiencing occasional migraine headaches, according to researchers from the University of Cincinnati (UC), Montefiore Headache Center, Albert Einstein College of Medicine and Vedanta Research.

The findings were published online in November in the journal Headache, a publication of the American Headache Society.

Neuroscientists have developed a new tool that lights up active conversations between neurons during a behavior or sensory experience, such as smelling a banana.

The scientists accomplished their feat by focusing on three of the sensory systems in Drosophila melanogaster - fruit flies, a model animal for learning about the brain and its communication channels.  Using fluorescent molecules of different colors to tag neurons in the brain to see which connections were active during a sensory experience that happened hours earlier.

People born with a rare genetic mutation are unable to feel pain, but previous attempts to recreate this effect with drugs have had surprisingly little success. Using mice modified to carry the same mutation, UCL researchers funded by the MRC and Wellcome Trust have now discovered the recipe for painlessness.

'Channels' that allow messages to pass along nerve cell membranes are vital for electrical signalling in the nervous system. In 2006, it was shown that sodium channel Nav1.7 is particularly important for signalling in pain pathways and people born with non-functioning Nav1.7 do not feel pain. Drugs that block Nav1.7 have since been developed but they had disappointingly weak effects.

Workplace incivility should be treated with the utmost seriousness. This is the finding of three psychologists at Lund University in Sweden who surveyed nearly 6 000 people on the social climate in the workplace. Their studies show that being subjected to rudeness is a major reason for dissatisfaction at work and that unpleasant behaviour spreads if nothing is done about it.