地球上的生物为什么出现大灭绝?大约距今2.5亿年前,一场可怕的灾难突然降临,造成了地球上90%的海洋生物和三分之二的陆地生物灭绝。遭受重创的地球经过漫长的演化,才重新变成一个生机盎然的地球。那么,地球遭受毁灭性打击的元凶是什么呢?科学家们经过研究发现:西伯利亚火山猛烈喷发,释放出大量二氧化碳,导致海洋变酸,引发了地球史上5次生物大灭绝中规模最大的一次。 Why do creatures on Earth appear mass extinct? About 250 million years ago, a terrible catastrophe suddenly came about, killing 90% of the planet’s marine life and two thirds of terrestrial species extinct. After a long period of hard landing, the Earth has become a vibrant earth again. So what are the culprits of the Earth’s devastating blow? Researchers have found that violent eruptions of the Siberian volcano release large amounts of carbon dioxide, causing the ocean to become sour, triggering the largest of five bio-extinctions in Earth’s history.