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.
While a 90 minute nap will allow you to fall into a deep sleep, a full hour 30 minutes allows you to complete a complete sleep cycle, giving you plenty of benefits, but also allowing you to rise without that confused sleepy feeling.