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Drinking two 8-ounce cups of coffee has been shown to lower heart failure risk by 11 percent

By Heidi Ledford of Nature magazine At last, a member of the celebrated sirtuin family of proteins has been shown to extend lifespan in mammals -- although it's not the one that has received the most attention and financial investment. Sirtuin genes and the proteins they encode have intrigued many researchers who study ageing ever since they were first linked to longevity in yeast.

By Zoe Cormier of Nature magazine A class of virus has for the first time been shown to jump from animals to humans--and then to infect other humans. The virus is described in PLoS Pathogens today. [More]

You might be surprised at some of the foods that have been shown to help fight flab

The hormone oxytocin, which has been shown to increase trust and social bonding, could also work as a treatment to relieve pain in those who suffer from frequent headaches, according to a new study.