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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.In the evening, in addition to "I am a singer-songwriter", Wang Sulong, as a supporting guest, was invited to participate in the closing night of Zhejiang Satellite TV's "Ace to Ace" and joined the men's running troupe. He had a great time with the Ace family. From "Variety Genius" of "I am a singer-songwriter" to "Ace to Ace" without idol baggage and having fun with everyone, Wang Sulong's variety sense attracted more and more attention.但是这不能改变什么，随着侠客文化的大肆宣传，人们的注意力便转移到了黑夜游侠和《天河传奇》上去了。Successful take-off, press G to retract the landing gear, and press the key to raise the height (this height will hit the mountain). What mountain is this?红衣少女和徐家少爷看到这个场景，都有震撼，不过在一瞬间之后，取而代之的便是怒火中烧。原本因为家庭因素而不得不分居的姬小路家兄妹，如今终于能重逢并住在同一个屋檐下。面对恋兄情结严重的妹妹秋子强势相逼，身为哥哥的秋人到底该怎么处理呢？除此之外，绰号"捕食者"的学生会长、冰山美人的副会长竟然也加入了争夺秋人的行列，看来未来于新学校的校园生活也不可能平静度过。一场激烈的男主角争夺战即将爆发！两人禁不住把那狂妄的家伙一顿臭骂，咒他骑马摔断腿，坐船落了水，上山碰了嘴，总之不得好过，又担心那些街坊，也不知伤了多少人。