Witness how the polar bear uses pressure ridges between colliding ice packs to seek out prey,how smell is p primary sense and how seals set up decoys to out-wit their would-be assailant.

• 看看北有熊怎样利用相撞增添块的压力去找猫物，嗅觉是这里最重要的感观，看看海豹怎样设陷阱对付敌人。