Today’s episode of Talking Sleep explores the “Mind After Midnight” hypothesis. Dr. Andrew Tubbs, a researcher in the department of psychiatry at the University of Arizona, explains sleep and circadian mechanisms that lead to a disproportionately increased risk of suicide between 2 and 3 a.m. The discussion may be troubling to some listeners. If you or someone you know is at risk for suicide, call 988 to reach the Suicide and Crisis Lifeline.