
Sleeping is something every human on Earth does, but why do we need to do it? Readers discover the answer in this accessible guide to the importance of sleep. Engaging color photographs and achievable text present the stages of sleep, the consequences of not getting enough sleep,...

Sleeping is something every human on Earth does, but why do we need to do it? Readers discover the answer in this accessible guide to the importance of sleep. Engaging color photographs and achievable text present the stages of sleep, the consequences of not getting enough sleep,...