You're born with roughly 9,000 taste buds, and they're very good at regenerating — which is why you can recover the ability to taste just days after burning your tongue. But that changes as we age. CSA Images/Getty Images hide caption

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CSA Images/Getty Images

Researchers found that a protein in human umbilical cord blood plasma improved learning and memory in older mice, but there's no indication it would work in people. Mike Kemp/Rubberball/Getty Images hide caption

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Mike Kemp/Rubberball/Getty Images

Human Umbilical Cord Blood Helps Aging Mice Remember, Study Finds

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Emil Girardi, 83, and Shipra Narruhn, 67, chat in Girardi's San Francisco apartment. They were paired through a nonprofit called Little Brothers, Friends of the Elderly, which aims to relieve isolation and loneliness. Anna Gorman/KHN hide caption

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Anna Gorman/KHN

Easing Old People's Loneliness Can Help Keep Them Healthy

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Diseased brain tissue from an Alzheimer's patient showing amyloid plaques (in blue) located in the gray matter of the brain. Dr Cecil H Fox/Science Source/Getty Images hide caption

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Elderly hospitalized patients taken care of by female doctors had better results than those seen by male doctors. Julie Delton/Getty Images hide caption

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Julie Delton/Getty Images

Patients Cared For By Female Doctors Fare Better Than Those Treated By Men

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Bobo gives her mother a kiss. Her mother can't talk or move her arms or legs. Kimberly Paynter/WHYY hide caption

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Kimberly Paynter/WHYY

Caring For A Loved One At Home Can Have A Steep Learning Curve

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A Brighter Outlook Could Translate To A Longer Life

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Laura Rees (left) and her sister Nancy Fee sit with their father, Joseph Fee, while holding a photo of his late wife, Elizabeth. Robert Durell for KHN hide caption

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Robert Durell for KHN

Rule Change Could Push Hospitals To Tell Patients About Nursing Home Quality

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More than a quarter of Japan's population is over the age of 65, and its birthrate is falling steadily. Bloomberg/Bloomberg via Getty Images hide caption

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Bloomberg/Bloomberg via Getty Images

Golden Years, Iron Bars: Japan Sees Rise In Crime By The Elderly

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Education may help brains cope with cognitive decline, and treatments for high blood pressure and other health problems may decrease dementia risk. Alfred Pasieka/Science Photo Library/Getty Images hide caption

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Alfred Pasieka/Science Photo Library/Getty Images

Dementia Risk Declines, And Education May Be One Reason Why

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