New Zealand, Norfolk Island, and OuvÃ©a, the Polynesian outlier near New Caledonia, are the unsubmerged portions of the largely sunken continent of Zealandia.
The 20-minute power nap -- sometimes called the stage 2 nap -- is good for alertness and motor learning skills like typing and playing the piano. What happens if you nap for more than 20 minutes? Research shows longer naps help boost memory and enhance creativity.
Keep It Under 40 Minutes. The best naps last about 20 to 30 minutes long. 40 minutes or more can make it tough to switch back to work-mode due to grogginess, according to Steven Shea, director of Occupational Health Sciences at Oregon Health & Science University. RELATED: The Guide to Better Sleep. Announce Your Nap.