A team of researchers from the California Institute of Technology (Caltech), Scripps College, Princeton University, and the University of Iowa writing in the journal Social Cognitive and Affective Neuroscience 
say appearance counts  when it comes to perception of politicians - but mostly if the appearance is negative.   This effect diminishes the more people know about a candidate.    So, voters who know little about John McCain coming up to election 2008 might be inclined to view him negatively when compared to a younger, more charismatic Barack Obama.

The natural world behaves a lot like the stock market, with periods of relative stability interspersed with dramatic swings in population size and competition between individuals and species.

While scholars may be a long way from predicting the ins and outs of the economy, University of Calgary biologist Edward McCauley and colleagues have uncovered fundamental rules that may govern population cycles in many natural systems. Their discovery is published today in the prestigious scientific journal Nature.

Chemistry researchers at The University of Warwick and the John Innes Centre, have found a novel signalling molecule that could be a key that will open up hundreds of new antibiotics unlocking them from the DNA of the Streptomyces family of bacteria.

The amount of methane in Earth’s atmosphere shot up in 2007, bringing to an end a period of about a decade in which atmospheric levels of the potent greenhouse gas were essentially stable, according to a paper published this week in Geophysical Review Letters. 

Methane levels in the atmosphere have more than tripled since pre- industrial times, accounting for at least one-fifth of the human contribution to greenhouse gas-driven global warming. Until recently, the leveling off of methane levels had suggested that the rate of its emission from the Earth’s surface was approximately balanced by the rate of its destruction in the atmosphere.

Don't reach for that antihistamine just yet, if you have allergies.  A new article in the December issue of The Quarterly Review of Biology provides evidence that allergies are much more than just an annoying immune malfunction - they may protect against certain types of cancer.  So suppressing cancer fighting defenses may not be the best idea.

It’s the most famous chord in rock 'n' roll, an instantly recognizable twang rolling through the open strings on George Harrison’s 12-string Rickenbacker. It evokes a Pavlovian response from music fans as they sing along to the refrain that follows:

"It’s been a hard day’s night
And I’ve been working like a dog"

The opening chord to "A Hard Day’s Night" is also famous because, for 40 years, no one quite knew exactly what chord Harrison was playing.

We know a lot about the lifestyles of dinosaur - where they lived, what they ate, how they walked - but not much was known about their sense of smell.  Until now.

Scientists at the University of Calgary and the Royal Tyrrell Museum are providing new insight into the sense of smell of carnivorous dinosaurs and primitive birds in a research paper published in Proceedings of the Royal Society B. The study, by paleontologist Darla Zelenitsky and Royal Tyrrell Museum curator of dinosaur palaeoecology François Therrien, is the first time that the sense of smell has been evaluated in prehistoric meat-eating dinosaurs. They found that Tyrannosaurus rex had the best nose of all meat-eating dinosaurs, and their results tone down the reputation of T. rex as a scavenger.

Could eating grapes help fight high blood pressure related to a salty diet? And could grapes calm other factors that are also related to heart diseases such as heart failure? A new University of Michigan Cardiovascular Center study suggests so.    The new study published in the October issue of the Journal of Gerontology: Biological Sciences  outlines the potential of grapes in reducing cardiovascular risk. The effect is thought to be due to the high level of phytochemicals – naturally occurring antioxidants – that grapes contain.

The study was performed in laboratory rats, not humans, so more research needs to be done.

A new study in the Canadian Journal of Economics outlines the first evidence on sexual orientation and economic outcomes in Canada. The study found that homosexual men have 12 percent lower personal incomes and lesbians have 15 percent higher personal incomes than heterosexual men and women.

Christopher S. Carpenter of The Paul Merage School of Business at the University of California Irvine used data from the Canadian Community Health Survey which includes standard demographic questions as well as self-reports on sexual orientation.

A new study in the Journal of Marital and Family Therapy explored how men and women perceive online and offline sexual and emotional infidelity. Results show that men felt sexual infidelity was more upsetting and women felt emotional infidelity was more upsetting.

Monica T. Whitty and Laura-Lee Quigley of Queen's University Belfast surveyed 112 undergraduate students and asked them questions about sexual and emotional infidelity both offline and on the internet. 

When given the choice, men were more upset by sexual infidelity and women were more upset by emotional infidelity.