They thrust their venomous stings at their ancient rivals' only weak spot. 它们将毒刺 刺向它们古老对手的唯一弱点
Back at her nest, the scout summons an army of her own. 侦察兵从巢穴召集了一支军队
At dusk, the flower opens once more. 黄昏时分 花再次张开
but one that spends its entire life at sea. 但一辈子在海中生活
At eight meters long, this is a plesiosaur. 这只蛇颈龙身长八米
Today's reptiles are such experts at living in the margins, 今天的爬行动物如此擅长在边缘生存