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.
1 Exercising for 10-15 minutes can be a great way to take a break while giving yourself even more energy to get your work done. 2  Take a 15-20 minute power nap if you need to. 3  Napping for this short amount of time is better for helping you regain your energy than napping for 1-2 hours, which will only make you feel groggy.