What does new research suggest about teenagers' behavior of staying up late?
Why do hormones play a role in teenagers' sleep patterns?
What is the hormone called that plays a role in sleep?
At what time do most adults start to produce melatonin?
What effect does playing computer games and watching television late at night have on teenagers' sleep?
What are the consequences of not getting enough sleep for teenagers?
What have some schools in America done to address teenagers' lack of sleep?
What was the result of starting classes later in the morning for American schools?
Is lack of sleep a common problem among teenagers?
What factor can make it harder for teenagers to fall asleep?
Why is sleep important for teenagers?
What hormone is essential for teenagers' growth?
What is the effect of melatonin?
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