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Exploring the science of keeping your mind sharp as you age

PBS News Hour - Full Show

Everyone wants to keep a sharp mind as they age, especially as dementia cases continue to rise. Now, a growing body of evidence suggests almost half…

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Episode Summary

Everyone wants to keep a sharp mind as they age, especially as dementia cases continue to rise. Now, a growing body of evidence suggests almost half of the key risks for cognitive decline can be prevented or delayed. Horizons moderator William Brangham explores the emerging science that can help protect against dementia with Dr. Jonathan…

Published October 9, 2026