简介：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.. 椰菜电影网完整版百度云在线观看高清1080P在线观看主要提供是一个不可多得的综合影视网站。，飘零影院又名大米影视HD高清完整版视频免费观看内涵动作片、喜剧片、好莱坞大片。日剧网,免费在线电影,全视频TVHD免费在线观看最棒的电影椰菜电影网，电影、电视剧、动漫、娱乐等高清视频全集快来享受极致观影体验。