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第 1 季，第 2 集: Like us, animals are exposed to parasites, bacteria and viruses - the germs which cause disease. How do they survive these attacks? Recent research and observation have shown that animals use plant and insect substances to treat themselves - not only do they apply things to their skin, they actually treat themselves by feeding on things not normally part of their diets.
Documentary · 2006年3月31日 · 51 分钟