Both extremes of hot and cold can be harmful to the human body, if the person is not prepared for such extremes. Cold climates tend to be drier, which can badly affect the body. Also dependent is whether one’s ancestors lived and adapted to certain climatic conditions. For example, the Vikings adapted well to the colder Pole areas, whereas Africans have developed tolerance to hotter climates. There are different bilobgical ways that humans have adapted to extreme conditions; for example, the Eskimos have adapted to very cold conditions, partially through insulation in body fat.
How does your body develop tolerance to cold and hot weather?
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