一种神秘现象在7亿1700万年前将地球变成了“雪球”。而差不多同时期,在如今从阿拉斯加到格陵兰岛之间的出现了密集的火山活动,而多年连续的火山爆发正是雪球效应的根源。火山喷发使大量气溶胶进入大气,导致地球温度迅速下降。哈佛大学自然科学教授弗朗西斯·麦克唐纳表示,“雪球地球和大规模火山爆发的同时存在绝非巧合,我们知道火山活动会对环境产生巨大影响,因此这两起事件间的联系是我们研究的重点。”哈佛大学的研究团队刚开始认为,玄武岩与大气中二氧化碳间发生的化学反应是导致该现象 A mysterious phenomenon turned the earth into a “snowball” seven hundred and seventy-seven million years ago. At about the same time, intensive volcanic activity is occurring between Alaska and Greenland today, and successive years of volcanic eruptions have been the source of the snowball effect. Volcanic eruptions allow large amounts of aerosols to enter the atmosphere, causing the Earth’s temperature to drop rapidly. According to Francis MacDonald, a professor of natural sciences at Harvard University, “It is no coincidence that snowballs and large-scale volcanic eruptions coincide, and we know that volcanic activity can have a huge impact on the environment, so the connection between the two events is ours The focus of the research. ”" Harvard University’s research team first came to the conclusion that the chemical reaction between basalt and carbon dioxide in the atmosphere caused this phenomenon