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Anyone who's experienced the heartbreak of a relationship ending knows it can be emotionally devastating. But scientists have found that a breakup also has physical effects on our brains — and our bodies. In Love Hurts: The Science of Heartbreak, a documentary from The Nature of Things, Anthony Morgan speaks with researchers and scientists to discover the biological effects of a broken heart. In the documentary, Morgan meets a team researching Takotsubo syndrome, where the stress of heartbreak or loss can actually change…

This story is part of CBC Health's Second Opinion, a weekly analysis of health and medical science news emailed to subscribers on Saturday mornings. If you haven't subscribed yet, you can do that by clicking here.Shift workers sleeping at erratic hours. Students pulling all-nighters. Menopausal women tossing and turning in bed from hot flashes.There are a host of reasons why people have periods of poor sleep. And anyone who's endured back-to-back nights of sub-par slumber likely knows the result: Feelings of brain fog,…