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央视生命探索纪录片《疯狂的牙齿 2018》数亿年前，地球上的动物渐渐拥有了神奇的牙齿。这些动物有的生活在海洋里，有的漫步在草原上，还有的栖息在沼泽中，它们的牙齿也进化出了不同的功能。有的能咬碎骨头，有的如匕首般锋利，能做退敌之用，有的数量众多，能像钩子一样深深刺入血肉，有的似乎能伤害动物自己，还有的则令人闻风丧胆。自然界中动物的牙齿就是这么不可思议，让我们一起来长长见识。
