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.
Experts differ on the ideal length of a nap. Some say between 20 and 30 minutes. Others believe napping beyond 20 minutes risks you feeling groggy afterwards. Drinking a cup of coffee before the nap can help you wake in about 20 minutes.