ScienceDaily reports that psychologists at the University of Arizona have found that naps enabled babies to learn more than ones who didn't take naps. Sleep has been long known to cement memory formation in adults. This sounds like the beginnings of a good excuse for that Sunday nap - "But honey, scientists have shown that it will make me smarter and improve my memory!"
The study was published in the August issue of Psychological Science.
(Hat tip: ScienceDaily)