The right sounds may turn sleep into a problem-solving tool

Sound cues during lucid dreams helped sleepers solve puzzles the next

Illustration of dreaming of a puzzle while asleep

In a study of lucid dreamers, researchers replayed soundtracks linked to brain-teasing puzzles participants couldn’t solve, nudging sleepers to dream about them and boosting the odds of solving the puzzles the next day.

Julia Dufossé

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