Can you ever catch up on sleep?

Forget the economy. Your sleep debt may be hurting you more than your dwindling 401(K) or tightening grocery budget. If the hours of rest you're getting is on a downturn, is it ever possible to make up all that lost sleep?The answer, according to this article in Scientific American, is yes, but only if you are willing to commit to recovering all (and more) of the sleep you've already lost.Here