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"Nova investigates a provocative new theory that suggests the extinction of more than 34 types of large prehistoric mega-creatures, such as the saber-toothed cat and woolly mammoth, was caused not by climate change or the arrival of the first human hunters, but by the massive breakup of a comet over the Great Lakes region at the end of the last Ice Age, some 12,900 years ago." -- WGBH/Nova website.
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"Behaviour is a significant indicator of health in animals and understanding behaviour is the key to good management. Animal behaviour and animal welfare science are fast becoming core topics in the curricula of agriculture and veterinary students." "The eagerly awaited fourth edition of Farm Animal Behaviour and Welfare has a new title to reflect its expansion to include companion animals. Domestic Animal Behaviour and Welfare builds on the coverage...