Rays are among the largest fishes and evolved from sharklike ancestors nearly 200 million years ago.... more

一九八六年，冷戰已近尾聲，然而在大海裡，美蘇雙方依然繼續玩著奪命的捉迷藏遊戲，未嘗稍歇。 就在美國東岸外海，一艘老舊的蘇聯彈道飛彈核子潛艦，發生一場致命的意外事故，核爆迫在眉睫。潛艦的核子反應器一... more

This full-color field guide is the result of a collaborative project between the governments of the ... more