Many animals live longer when raised on low calorie diets. But now researchers at Washington University School of Medicine in St. Louis have shown that they can extend the life spans of roundworms even when the worms are well fed — it just takes a chemical that blocks their sense of smell.

Researchers have put forward a simple model of development and gene regulation that is capable of explaining patterns observed in the distribution of morphologies and body plans (or, more generally, phenotypes). The study, by Elhanan Borenstein of the Santa Fe Institute and Stanford University and David Krakauer of the Santa Fe Institute was published in this month's issue of PLoS Computational Biology.

Youth in their late teens who live in poor neighbourhoods are four times more likely to attempt suicide than peers who live in more affluent neighbourhoods, according to a new study from Canada's Université de Montréal and Sainte-Justine Hospital Research Center, as well as Tufts University in the U.S. The researchers also found youth from poor neighbourhoods are twice as likely to report suicidal thoughts.

Researchers at the Heidelberg University Hospital have discovered a new genetic disease that can lead to severe liver damage. Because a protective component of the bile is missing, the liver cells are exposed to the toxic components of the bile, resulting in cirrhosis of liver, a transformation of liver cells into connective tissue with a gradual loss of liver function. This could explain some of the cases of liver cirrhosis of unknown origin and open up a new approach for treatment. The research has now been published in the journal "Hepatology".

Sneezing, runny nose and chills? You might blame the human rhinovirus (HRV), which causes 30 to 50 percent of common colds. But in reality, it's not the virus itself but HRV's ability to manipulate your genes that is the true cause of some of the most annoying cold symptoms.

Bumblebees use flower scent to guide their nest-mates to good food sources, according to scientists from Queen Mary, University of London.