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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.礼堂悬灯结彩，装点得花团锦簇。刘家因为这是头一个闺女出门，且许的又是郑家。担心二人的丹生谷（赤崎千夏 饰）想出个馊主意，于是这对少男少女展开了足迹遍布全日本的私奔之旅……我抱着那葵花盘子掰瓜子，掰得我手都起泡了。刚毕业的大学生曹沐春和小眼镜马小凡，遵循农业大学“解民生之多艰”的校训，来到古运河畔的百合村当起了“村官”。这是一对动静结合、性格迥异、各有所长的有趣组合。百合村的村主任周宝全在对待大学生“村官”的问题上，开始的态度并不积极。村里的村民也觉得大学生“村官”只是来“镀金”的。但这反而成为激励他俩决心为村民谋利益的动力。先是给村里的孩子们开办英语班，架起了和村民沟通的桥梁；而后，又通过到农大请教授来村里指导种燕麦，又将孟乡长引荐给最反感和官员打交道的顾教授，从而获得乡长和周主任的好感。之后，他们又撮合巧红娘和翟二嫂合作开办鸭场，一步步的使周主任和村民认识到大学生村官在农村基层经济建设中起到的积极作用。曹沐春和小眼镜先后经历了一系列考验，两位村官乐观坚强面对，终于赢得了村民的认可与信任，在他们的任职期间交上了一份满意的答卷。