When I wake up early in the morning

I almost slept through a story on Morning Edition just now, about sleep:

In our fast-paced, global society, many people consider it a big plus to need as little sleep as possible. But almost every sleep researcher will tell you that most people need at least seven hours of sleep for biological and psychological health. So there is a glaring disconnect between what the messages in our culture say about sleep and the messages we receive from scientists.