A new study from the Centers for Disease Control and Prevention finds no link between the number of vaccinations a young child receives and the risk of developing autism spectrum disorders. Jeff J. Mitchell/Getty Images hide caption

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Number Of Early Childhood Vaccines Not Linked To Autism

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People who are socially isolated may be at a greater risk of dying sooner, a British study suggests. But do Facebook friends count? How about texting? iStockphoto.com hide caption

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Maybe Isolation, Not Loneliness, Shortens Life

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George McCann has been diagnosed with a subtype of bipolar disorder called the "fear of harm" profile, and finds that a prescribed dose of ketamine every few days alleviates his symptoms. Michael Rubenstein for NPR hide caption

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How An Unlikely Drug Helps Some Children Consumed By Fear

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Social worker Nuria Casulleres shows a portrait of Audrey Hepburn to elderly men during a memory activity at the Cuidem La Memoria elderly home in Barcelona, Spain, last August. The home specializes in Alzheimer's patients. David Ramos/Getty Images hide caption

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Alzheimer's 'Epidemic' Now A Deadlier Threat To Elderly

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Scientists say that understanding how the cocktail party effect works could help people who have trouble deciphering sounds in a noisy environment. Guests make it look easy at a Dolce and Gabbana Lounge party in London in 2010. Paul Jeffers/AP hide caption

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Hear That? In A Din Of Voices, Our Brains Can Tune In To One

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Bonobos share a piece of fruit at the Lola ya Bonobo sanctuary in the Democratic Republic of Congo. Jingzhi Tan/Duke University hide caption

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How Did Our Brains Evolve To Equate Food With Love?

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Despite public health campaigns urging women in the U.S. to take folic acid, many are still not taking the supplements when they become pregnant. iStockphoto.com hide caption

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Folic Acid For Pregnant Mothers Cuts Kids' Autism Risk

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Jonathan Mitchell is autistic and wants to donate his brain to science when he dies. David Gilkey/NPR hide caption

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Shortage Of Brain Tissue Hinders Autism Research

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State Senator Jeff Klein (L-R), Assembly Speaker Sheldon Silver, Lieutenant Governor Robert Duffy and Senator Andrea Stewart-Cousins congratulate New York Governor Andrew Cuomo after he signed the New York Secure Ammunition and Firearms Enforcement Act on Tuesday. Hans Pennink/Reuters/Landov hide caption

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Mental Health Gun Laws Unlikely To Reduce Shootings

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If you know some mice that took This Is Spinal Tap too literally, they might want to know about an experiment to restore hearing with a failed Alzheimer's drug. The Kobal Collection hide caption

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Alzheimer's Drug Dials Back Deafness In Mice

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This satellite image from Oct. 28 shows Hurricane Sandy in the Atlantic Ocean before making landfall. NASA via Getty Images hide caption

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A Busy And Head-Scratching 2012 Hurricane Season

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Brain scans using Amyvid dye to highlight beta-amyloid plaques in the brain. Clockwise from top left: a cognitively normal subject; an amyloid-positive patient with Alzheimer's disease; a patient with mild cognitive impairment who progressed to dementia during a study; and a patient with mild cognitive impairment. Slide courtesy of the journal Neurology hide caption

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Despite Uneven Results, Alzheimer's Research Suggests A Path For Treatment

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A person's DNA can say a lot about a person, but not why someone has committed a horrific crime like mass murder. iStockphoto.com hide caption

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Killer's DNA Won't Explain His Crime

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A boy in Lima, Peru, receives a hepatitis B vaccine during an immunization drive in 2008. The United Nations is considering a ban on the preservative thimerosal, which is often used in hepatitis B and other vaccines in developing countries. Martin Mejia/AP hide caption

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Doctors Argue Against Proposed Ban On Vaccine Preservative

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A light micrograph image of telomeres, shown in yellow, at the end of human chromosomes. Women tend to have longer telomeres than men and tend to outlive men, according to new research matching genetic information with medical records. Peter Lansdorp/Visuals Unlimited/Corbis hide caption

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Matching DNA With Medical Records To Crack Disease And Aging

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