We know that sleep is critical for our physical and mental wellbeing, but as it turns out, the answer doesn't simply lie in the number of hours we spend unconscious each night. New research from digital healthcare company, Huma, suggests that a goldilocks bedtime between 10-11PM is linked with a lower risk of heart disease. Katie King spoke to Dr David Plans, Head of Research from Huma to find out why we all need a bedtime... Like this podcast? Please help us by supporting the Naked Scientists