A curious bear investigates the smell of blood near a wire hair snag. Locks of hair from more than 400 grizzly bears are stored at Montana State University, waiting to tell the tale of genetic diversity in the Yellowstone Ecosystem.

Methods to identify a patient with a Do Not Resuscitate (DNR) order are incredibly varied across hospitals, ranging from written documentation practices to the use of color-coded wristbands. According to a new study in the Journal of Hospital Medicine, a national effort to standardize color-coded wristbands, likely around a few specific indications (e.g., DNR status, allergy, fall risk, etc.), would remove current practice variations and the associated potential for errors.

Scientists long have focused on how climate and vegetation allowed human ancestors to evolve in Africa. Now, University of Utah geologists are calling renewed attention to the idea that ground movements formed mountains and valleys, creating environments that favored the emergence of humanity.

No human can survive longer than a few minutes underwater, and even a well-trained Olympic swimmer needs frequent gulps of air. Our brains need a constant supply of oxygen, particularly during exercise.

An international team of researchers led by Mayo Clinic have designed a technique that uses the body’s own cells and a virus to destroy cancer cells that spread from primary tumors to other parts of the body through the lymphatic system. In addition, their study shows that this technology could be the basis for a new cancer vaccine to prevent cancer recurrence.

By using a combination of inexpensive infection control measures, hospitals around the world could prevent half the new cases of extensively drug resistant tuberculosis (XDR TB), according to a new study in The Lancet by researchers at Yale School of Medicine.