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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“Don’t put yourself under as much pressure as I was under,” the billionaire recently told Blackstone’s summer analysts. “I went for max everything … So I’ve absorbed a lot of self-created stress, and I still do it. But now my nerve endings are burned off, so it doesn’t bother me at all.”