北极熊陷绝境：悲剧不仅是自相残杀 Polar bears straits: the tragedy is not only kill each other 饥肠辘辘的北极熊不得已同类相食。 Starving polar bears turn to cannibalism。最近拍摄到的照片显示，由于全球变暖导致猎食地消失，北极熊开始捕食同类。New pictures show that polar bears are beginning to cannibalise each other as global warming destroys its hunting grounds。北极熊通常在浮冰上抓捕海豹作为食物。但由于全球变暖，浮冰融...
