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.
Four Steps to Power Nap Like a Pro: Find a good spot. Put your head down on a quiet table in the student lounge. Cozy up in a chair when you get home, before you do homework. You can power nap almost anywhere -- in the library or on the bus on the way to a game. Keep it short. Shoot for a 20- to 30-minute nap. Set your alarm, so you donât oversleep. A longer nap can make you groggy and feel worse.