Exploring the function of sleep

Is sleep essential? Ask that question to a sleep-deprived new parent or a student who has just pulled an "all-nighter," and the answer will be a grouchy, "Of course!"

If you want to include this story in your blog, copy and paste this formatted text:

<p><a href="http://www.physorg.com/news138941239.html">Exploring the function of sleep</a></p> <p>Is sleep essential? Ask that question to a sleep-deprived new parent or a student who has just pulled an "all-nighter," and the answer will be a grouchy, "Of course!"</p>