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Fascinating brain facts The brain is a wonderful, mysterious and fascinating organ. Here are a few interesting facts. |  | Memory problems not always dementia More than one-fifth of Americans over age 70 have some memory impairment that isn't classified as dementia, a new study has found. |  | Brain size may influence memory New research shows that people who have a larger part of the brain, called the hippocampus, may be protected from the effects of Alzheimer's-related brain changes. |
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