Wild Animals in Captivity. Animals in Cages re Natural Adaptations, cf. Humans in Crowded Conditions. Animal Rights. Religious Views of Animals. Conservation Efforts that Succeed or Go Awry.

• 19被囚禁的野生动物。笼里的动物重新适应自然，比较在拥挤状态下的人类。动物权利。动物的宗教观点。成功或者出错的保育成果