Fifteen million years ago, these giant marine cities 1500万年前 这些巨大的海洋城市
These survivors were kept warm by feathers... 这些幸存者靠羽毛保暖
These are the extremes that can evolve 这些都是在永恒的生死博弈中
But for these nervous little youngsters... 但对于这些紧张的幼崽们来说
these small creatures were limited to a life in the margins. 这些小生物局限在边缘生活
But these ants have their own specialist weapons. 但这些蚂蚁也有自己的专用兵器
These are predatory Megaponera ants. 这些是掠食性的马塔贝勒蚁
Competition between these rival species 这些对手物种之间的竞争