HAVE threw firewood Do I need to stoke the furnace in the house which the owners have left a long time? This depends on the fact that he is himself. Most empty houses are not heated in winter, others drown, And how do animals more profitable? What is more economical for them: around the clock to maintain the body temperature at a constant level, or by using the principles of environmental thermoregulation, raise it only in periods of high activity, and the rest of the time in order to save to maintain the minimum level? At first glance, the second method seems more appropriate. However, it concerned over the fact that among the higher animals, few adhere to this modus. Let's try on the basis of the quantitative estimates, answer the question.