Here's another reason to hate leftovers. A research study in the Journal of Leukocyte Biology sheds light on one cause of arthritis: bacteria. In the study, scientists from the United States and The Netherlands show that a specific gene called NOD2 triggers arthritis or makes it worse when leftover remnants of bacteria cell walls, called muramyl dipeptide or MDP, are present. This discovery offers an important first step toward new treatments to prevent or lessen the symptoms of inflammatory arthritis.

Here's another reason why dieters should avoid all-you-can-eat buffets: When faced with a large variety of items, consumers tend to underestimate how much of each item is present, according to a new study in the Journal of Consumer Research.

Authors Joseph P. Redden (University of Minnesota) and Stephen J. Hoch (University of Pennsylvania) investigated consumers' perceptions of quantity in a set of experiments that may help us understand how quantity perceptions influence portion sizes.

"Does a bowl with both red and blue candies seem to have more or less than a bowl with only one color candy?" the researchers asked. "Contrary to popular belief, the presence of variety actually makes it seem like there are fewer items."

Some consumers will opt for local products and others always prefer global brands.   A new study in the Journal of Consumer Research takes a look at why local goods can even beat out recognizable global brands like Coke or Pepsi.

"Due to rapid globalization, local products—products with specifications and packaging tailored for local markets, such as Mecca Cola (France) and Fei-Chang Cola (China)—and global products (products with the same specifications and packaging for consumers from around the world) such as Pepsi and Coke, routinely compete against each other," write authors Yinlong Zhang (University of Texas at San Antonio) and Adwait Khare (Quinnipiac University).

It has been revealed that 1 in 3 people in the UK are still struggling to find an NHS dentist, according to new research from Simplyhealth.

Simplyhealth's Annual Dental Survey has revealed that alarmingly just over a third of Brits (35%) struggled to find an NHS dentist over the last year, which has increased from 23% at the same time in 2008.

Perhaps more shocking is the fact that this figure soars in certain areas of the UK, with over half of the people in Plymouth finding it difficult to get an NHS dentist, closely followed by those in Southampton and Manchester, where 45% and 43% have struggled.

The severity of the situation this year has been heightened by the economic downturn, as almost half of people across the UK have put off visiting the dentist becaus

Researchers at the universities of Leicester and Oxford have made a discovery about plant growth which could potentially have an enormous impact on crop production as global warming increases.

Dr Kerry Franklin, from the University of Leicester Department of Biology led the study which has identified a single gene responsible for controlling plant growth responses to elevated temperature.

Video games that involve high levels of action,like first-person-shooter games, can increase real-world vision, according to research in Nature Neuroscience, including discerning slight differences in shades of gray; an attribute of the human visual system that can't be improved, it has been believed.

Daphne Bavelier, professor of brain and cognitive sciences at the University of Rochester, says that very practiced action gamers can actually become 58 percent better at perceiving fine differences in contrast.