地球的力量 第5集 稀有行星(21):因禍得福

Catastrophes like the Chicxulub meteorite aredisastrous for the life that happens to be around atthe time.

?？颂K魯伯隕石這樣的災(zāi)難 對(duì)于當(dāng)時(shí)存在的生物來(lái)說(shuō)是災(zāi)難

But in terms of stimulating the evolution ofcomplex life,

但是因?yàn)樗鼈兗て鹆诉M(jìn)化

they're actually a blessing in disguise.

實(shí)際上是一次因禍得福

The extinction of the dinosaurs wasn't the only time that a catastrophe kick-started a majorevolutionary change.

恐龍的滅絕 并不是唯一一次導(dǎo)致進(jìn)化的災(zāi)難

In the Italian Dolomites, geological evidence shows

在多洛邁茨山脈我看到了恐龍如何

how the dinosaurs themselves benefited from a previous catastrophe.

從前一次災(zāi)難中因禍得福

This layer of black rock marks a time when 70% of all life on land perished.

這一層黑色的巖石標(biāo)志著 地球上70%的生命滅亡了

Over 90% of marine life died out.

超過(guò)90%的海洋生物死亡

And when it was over, it was the dinosaurs that inherited the Earth.

結(jié)束以后，恐龍接手了地球

And in Australia, it's possible to see the last survivors of an even earlier catastrophe.

在澳大利亞 我也看到了一次早期的災(zāi)難

These mounds are bacterial stromatolites.

這些土堆是細(xì)菌疊層石

They might still rule the Earth today were it not for a colossal ice age,

一次巨大的冰山運(yùn)動(dòng)結(jié)束了疊層石時(shí)代

which nearly wiped them out,clearing the way for the first complex life.

這些細(xì)菌的死亡 為復(fù)雜生命出現(xiàn)第一步掃清了道路