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.

· · 来源：news-bj资讯

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What is MotoGP?MotoGP is the oldest established motorsport world championship, with the inaugural season taking place in 1949. Races last approximately 45 minutes, without pitting for fuel or fresh tires.

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Maddie MolloyClimate & science reporter