There is more ocean on our planet than there is land, but we still know little about it. The first ship sailed all the way around the world about five
hundred years ago. And the first journey to the deepest sea floor was sixty years ago.
Great waves move across the surface of the ocean, and currents of cold and warm water move past our continents. The biggest animals on our planet swim around the Southern Ocean, and in the hottest parts of the ocean we can find animals that live without light. It is a strange world – and we are just beginning to know it…
地球上的海洋面積比陸地面積大，我們對海洋卻知之甚少。約500年前，人們第一次乘船環(huán)游了世界，而首次探索海床最深處的旅程也不過發(fā)生在60年前。
巨浪席卷海面，冷暖洋流流經(jīng)我們的各大洲。地球上最大的動(dòng)物生活在南大洋附近的海域，而在海洋溫度最高的某些地方，我們可以找到不需要光便可生存的動(dòng)物。海洋是一個(gè)神奇的世界，而我們對它的探索才剛剛開始……