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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Now it is in position, the final tests, checks - and a dress rehearsal - will take place, before the go-ahead is given for the 10-day Artemis II mission that will see four astronauts travel around the Moon.

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