一项发表在《地球物理研究杂志：生物地球科学》上的新研究揭示了6600万年前Chicxulub小行星撞击地球的致命机制。1研究表明，这次撞击产生的巨大尘埃云使大气上层过度加热，烧焦了无法躲避的生物并引发大规模野火，最终导致地球上四分之三的动植物物种灭绝。1
这一发现为1980年由Luis Alvarez及其子Walter Alvarez提出的"Alvarez假说"提供了支持。1根据研究数据，撞击体大小介于11至81公里之间，其释放的能量是1945年广岛和长崎原子弹释放能量的10亿倍以上。1位于墨西哥尤卡坦半岛的Chicxulub陨石坑是这次灾难性撞击的物理证据。1
A new study published in the Journal of Geophysical Research: Biogeosciences presents evidence that the catastrophic asteroid impact 66 million years ago at Chicxulub in Mexico's Yucatan Peninsula triggered a chain of events that incinerated countless organisms and drove three-quarters of all plant and animal species on Earth to extinction.1 According to the research, the collision would have generated an immense cloud of dust that superheated the upper atmosphere, charbroiling living organisms that could not escape the intense heat.1 The impact energy was estimated to exceed one billion times that of the atomic bombs dropped on Hiroshima and Nagasaki in 1945.1
The impactor itself, measuring between 11 and 81 kilometers in diameter, triggered widespread wildfires following the atmospheric catastrophe.1 This study reinforces the Alvarez hypothesis, first proposed in 1980 by Luis Alvarez and his son Walter Alvarez, which attributes the mass extinction event to asteroid impact.1
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