Vampire bats are common in Central and South America, where they feed on livestock and sometimes people. Michael & Patricia Fogden/Corbis hide caption

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Wanda Kaczynski and her son David Kaczynski (right background) are escorted to their car by defense lawyers after Unabomber Theodore Kaczynski pleaded guilty Jan. 22, 1998, in Sacramento, Calif. John G. Mabanglo/AFP/Getty Images hide caption

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When Your Family Member Does The Unthinkable

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The white arrows in these two tumor samples point to a subset of tumor cells that are in a resting state. Nature hide caption

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Lab Findings Support Provocative Theory On Cancer 'Enemy' Within

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Contestants Marianne Baba (left), Lois Conway and Ruth Swenson stand next to plates of their X-Rays during a chiropractor-judged beauty contest. Wallace Kirkland/Time hide caption

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Will Health Provisions Tame Birth Control Cost?

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Health and Human Services Secretary Kathleen Sebelius joins Democratic senators at a news conference on Capitol Hill on Tuesday to announce new preventive health coverage for women that takes effect Wednesday. Win McNamee/Getty Images hide caption

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Under Health Law, 'No-Cost' Birth Control Starts Today

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Disease Expert Calls For More Talk On Flu Experiments

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National Institute of Allergy and Infectious Diseases Director Dr. Anthony Fauci said a voluntary halt to bird flu research should stay in effect. Chip Somodevilla/Getty Images hide caption

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Self-Service Kiosks Poised To Change Health Care

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The Ebola virus causes a deadly form of hemorrhagic fever. Frederick Murphy/CDC hide caption

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Drivers under 25 are more likely to send text messages and make calls behind the wheel. They're also less able to handle distractions while driving. iStockphoto.com hide caption

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This photo provided by the U.S. Attorney's Office in New Hampshire shows David Kwiatkowski, a former lab technician at an Exeter, N.H., hospital. AP Photo/U.S. Attorney's Office hide caption

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Medical Technician Might Have Exposed Hundreds To Hepatitis C

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CamelBak-brand water bottles on display at an outdoor supply store in Arcadia, Calif., in 2008. The company removed BPA from the plastic in its bottles. David McNew/Getty Images hide caption

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Legal Battle Erupts Over Whose Plastic Consumers Should Trust

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A government official in Bali, Indonesia, holds a chicken before administering an injection to cull it as a precautionary measure in April to prevent the spread of bird flu. Firdia Lisnawati/AP hide caption

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