• Days after a Pennsylvania visitor became the second park guest confirmed to have died of hantavirus pulmonary syndrome, the National Park Service was warned in 2010 that efforts should be stepped up to inspect for rodents in Yosemite.

    LAST UPDATE : Dec 05, 2012, 11:30 PM EST
  • Hospitals are rife with infections and opportunities for medical mistakes. Now, a nearly $9 million project at Johns Hopkins University aims to combine engineering with the power of patients and their families to prevent mistakes.

    LAST UPDATE : Dec 05, 2012, 8:30 PM EST
  • This undated handout photo provided by the Proceedings of the National Academy of Sciences and the University of Göttingen shows photomicrographs of the two new species of ancient gall mites in 230-million-year-old amber droplets from northeastern Italy. The gall mites were named: Triasacarus fedelei, left, and Ampezzoa triassica.

    Scientists have found three well preserved ancient insects frozen in amber — and time — in what is Earth's oldest bug trap.

    LAST UPDATE : Dec 05, 2012, 2:00 PM EST