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.
But you must take at least 6 hour sleep and it should not cross more that 8 hours. Because too much sleep sometime becomes reason of low activeness. And if you feel sleeping anytime then take power nap of 15 minutes or maximum of 20 minutes to keep yourself active.