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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 Copenhagen Zoo, who killed a giraffe and fed it to the lions, to witness their culling process first hand. They think it is a natural part of zoo keeping that is often swept under the carpet. Should some animals never be kept in captivity? In a world exclusive, Liz visits SeaWorld in Florida and asks if captivity drove one of their orcas to kill his trainer.But could zoos be the answer to conserving endangered species? Liz examines their record, from helping breed pandas for the wild to efforts to save the rhinos. She meets one of the last surviving northern white rhinos and discovers the future of this species now lies in a multimillion-dollar programme to engineer them from stem cells. Veteran conservation scientist Dr Sarah Bexell tells Liz the science of captive breeding is giving humanity false hope.以济南为背景乃至全国110警员排除万难、为民服务的感人事迹为采访视线，重塑人民警察的光辉形象。860010-1104021000火长魏铜瞥了秦淼一眼，板脸道：有的吃就不错了，几颗石子算什么。马镫？众人都是一阵惊奇，很显然他们并未听说过这个新奇的玩意。家和万事兴》沿用《百万新娘2》的 原班金牌制作班底，讲述了一对姐妹的婚 姻生活在经历了重重磨难和困难之后重获 幸福的故事。