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.
Here are a few steps to the perfect nap to get you through the day at peak performance: Quick, 20-minute power naps are typically better than longer ones since lengthier naps cause you to get into deeper stages of sleep, leading to an increased feeling of grogginess upon awakening.