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The spherules were evidence that the fireball had vaporised billions of tonnes of rock.
小球體證明了火球使得數(shù)億噸巖石蒸發(fā)。
In outer space the vapour condensed into tiny droplets which fell back all over the earth as white hot spherules.
在外太空，它們凝縮成微小的熔珠，它們落滿整個(gè)地球，變成白熱的小球體。
Then scientists discovered another clue in the KT boundary, high levels of soot.
接著科學(xué)家們又在第三紀(jì)界線層中找到了另一條線索，高含量的煙灰。
From America to New Zealand there seemed to be evidence of massive burning at the time of the impact.
從美國到新西蘭，似乎都有證據(jù)支持這場大碰撞引起的大火。
It looked as if the world's forests had spontaneously ignited as the rain of spherules heated the atmosphere by up to a thousand degrees centigrade.
看起來好像是從大氣中落下的小球體雨，帶著1000℃的高溫自動(dòng)點(diǎn)燃了全世界的森林
If we're looking at six hundred, a thousand degrees
如果溫度達(dá)到600℃，1000℃，
then this would instantly have ignited all the plant matter across the world
它就能立刻點(diǎn)燃全世界的植被，
and it just would have been sent up in flames.
很快便會(huì)形成熊熊大火。
The impact was also thought to have created a deluge of vicious acid rain.
人們認(rèn)為大碰撞還會(huì)造成毀滅性的酸雨泛濫。
The fireball had released chemicals which turned the water deadly.
火球釋放的化學(xué)物質(zhì)把水變成了致命毒源。
It was suggested that the acid rain had a PH so low that it was like battery acid
據(jù)說酸雨的pH值達(dá)到電池酸那么低，
and if you had something that low in PH
如果pH值真的降到那種水平，
it would literally burn everything on the land from plants to dinosaurs to everything else.
那么它肯定將摧毀陸地上的一切，從植物到恐龍，還包括其它生物。
