PARIS, France (AFP) — Sleeping six hours or less per night in your 50s and 60s is associated with an increased risk of dementia, according to a new study of nearly 8,000 British adults followed for more than 25 years. Scientists said that while the research, which was based on data from a long-running survey, could not prove cause and effect, it did draw a link between sleep and dementia as people age. The study, […]