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.
It all has to do with sleep cycles. A quick power nap should last between 10 and 26 minutes (it gets this specific for a reason: NASA scientists found that a 26-minute nap improved pilot performance by 34 percent and alertness by 54 percent).