【观看小贴士】： [DVD：普通清晰版] [BD：蓝光高清版] [HD：高清版][TS/TC：抢先非清晰版] - 其中，BD/HD版本不太适合网速过慢的用户观看
无需安装任何插件,即可直接观看
剧情介绍
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...
- 除了"BBC地平线：我们该关了动物园吗？"你也可能喜欢以下影片：
