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.
Talk to your family doctor about how much exercise is right for you. A good goal for many people is to work up to exercising 5 times a week for 30 to 60 minutes at a time.If 30 to 60 minutes at a time sounds difficult to fit into a busy schedule, you can split up your physical activity into smaller chunks of time.Try exercising for 10 minutes at a time throughout your day. If you're too stiff to exercise in the morning, wait until later in the day. 2  Don't get discouraged. 3  It can take weeks or months before you notice some of the benefits of exercise, such as weight loss. 4  Forget âno pain, no gain.â While a little soreness is normal after you first start exercising, pain isn't.