A new study from researchers in Ottawa and Toronto suggests that a commonly used type of bone marrow stem cell may be able to help treat sepsis, a deadly condition that can occur when an infection spreads throughout the body. The study, published in the American Journal of Respiratory and Critical Care Medicine, shows that these cells can triple survival rates in an experimental model of sepsis.

The evolutionary mystery of menopause is a step closer to being solved thanks to research on killer whales.

Viral hepatitis affects more than 500 million people worldwide and is a cause of liver failure and liver cancer. While vaccines are available for hepatitis A and B, this is not the case for hepatitis C, which affects as much as two percent of the population in the U.S. Scientists today are reporting discovery of a virus related to hepatitis C in Asian bats, which may provide insights into the origins of the hepatitis C virus and into the mechanisms by which infectious diseases move from other species to humans.

Researchers at Oregon State University and the California Institute of Technology have discovered that a genetic regulator which is critical to many life functions also plays a key role in the formation of "T cells," a type of white blood cell that's important in immune function.