The online Beagle library now allows anyone to see the amazing range of visual imagery that Darwin poured over during the voyage. See the illustrations here Humboldt's illustration of his famous ascent of Mount Chimborazo in the Andes in 1802.
And it may be our busy lifestyle that keeps us from napping. While naps do not necessarily make up for inadequate or poor quality nighttime sleep, a short nap of 20-30 minutes can help to improve mood, alertness and performance.
March 9, 2011 at 12:01 pm. Iâve written a book about this! â Relaxing into Meditation. I agree that 20 â 30 minutes a day is a good length of time for meditation, but this may sound like a long time for a beginner. I suggest beginning with 10 minutes a day.