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Liz Bonnin presents a controversial and provocative episode of Horizon, investigating how new scientific research is raising hard questions about zoos - the film explores how and why zoos keep animals, and whether they need to change to keep up with modern science or ultimately be consigned to history. Should zoos cull their animals to manage populations? Liz travels to Copenha...如果您喜欢黄果短剧官网（www.2217yx.com）分享的《BBC地平线：我们该关了动物园吗？》，别忘了推荐给你的好友！
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