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.
If you have a little more freedom in your schedule, taking a longer nap -- one that lasts 60 to 90 minutes -- has even more benefits for your mind and cognition. An hour to hour and a half nap improves memory test results as much as an eight-hour night of sleep, according to UC Riverside research.