Start school later, sleep longer, learn better: New study shows that flexible school start times can be an effective and practical approach to reducing chronic sleep deprivation and improving adolescents’ mental health and academic performance.

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Фото: Сергей Бобылев / ТАСС

Viren Swami believes today's ideas about romantic love can be traced back to medieval European stories like Lancelot and Guinevere

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英國首名嬰兒透過已故

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