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.
The mini-nap is a 5-15 minute nap where you wake up after stage 2. Napping for this long has been shown to increase stamina and alertness as well as paying back some sleep debt. The Power Nap is probably the best known of the nap categories. It is a 15-30 minute nap where you wake up after stage 3.