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Researchers are using brain scans, blood and spinal fluid to detect early signs of Alzheimer's disease. These "biomarkers" may also offer a quicker way to test new Alzheimer's drugs.
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Growing up, Judith Grisel struggled with alcohol, marijuana and cocaine. Now as a neuroscientist, she's working to understand the biological basis of addiction. Her new book is Never Enough.
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Researchers say the metabolism of a woman's brain remains higher than a man's throughout a lifetime. And that may help with late-life creativity and learning.