Like the ichthyosaurs.
像這些龍魚,
Their reptile ancestors lived on land, but as the planet changed,
它們的爬行類祖先生活在陸地,
so did these animals.
但地球改變后它們也隨之改變,
They grew fins and moved into the newly formed Atlantic Ocean.
它們長出魚鰭,搬進剛剛形成的大西洋,
This one is 20 feet long, and can travel at a quick 25 miles an hour.
這條身長6公尺,時速約為40公里,
It's the ocean's fastest creature and most efficient predator.
它是海里速度最快的生物,也是最有效率的掠食動物,
It rules the oceans for 50 million years.
統(tǒng)治海洋長達5000萬年之久。
But now, there's a new contender.
但現(xiàn)在有新的王位競爭者,
The pliosaur.
上龍。
Longer than a bus, and as heavy as a truck,
它比公交車長,和卡車一樣重,
its jaws are eight times more powerful than a great white sharks', with teeth 12 inches long.
它的顎比大白鯊的顎強8倍以上,而且牙齒長達30公分,
The Earth, and its inhabitants, have changed beyond recognition.
地球與地球生物,變得難以辨認,
This was once solid ground, now it's the Atlantic Ocean.
這里本來是陸地,這下卻變成大西洋,
The very spot where ammosaurs grazed and dilophosaurs stalked their prey.
我們曾站在這里看砂龍吃草,看雙脊龍跟蹤獵物,
The dinosaurs' world may be different,
恐龍的世界或許不同了,
but they're as dominant as ever.
但它們依舊是霸主,
They appear invincible.
它們似乎無往不勝。