On returning to England, Darwin and an ornithologist associate identified 13 species of finches that he had collected on the GalÃ¡pagos Islands. This was puzzling since he knew of only one species of this bird on the mainland of South America, nearly 600 miles to the east, where they had all presumably originated.
To get the most out of a nap, follow these tips: 1  Keep naps short. 2  Aim to nap for only 10 to 30 minutes. 3  The longer you nap, the more likely you are to feel groggy afterward. 4  Take naps in the afternoon.
It makes for a more relaxed day. In the long run, many people would be more productive if they could nap or meditate for a period of time during their work day. You should know if 6 1/2 hrs is enough for you (in addition to the nap) based upon how you feel when you wake up.