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WEDNESDAY, Jan. 21, 2026 (HealthDay News) — Ever notice how hard it is to stay sharp after a rough night of sleep?
A recent study published in the journal Nature Neuroscience points to a surprising reason why: The brain may briefly shift into a sleep… [3056 chars]
Source: U.S. News & World Report | Published: 2026-01-21T16:25:00Z
Credit: U.S. News & World Report
