In February of 1942, Mexican farmer Dionisio Pulido thought he heard thunder coming from his cornfield. However, the sound wasn’t coming from the sky. The source was a large, smoking crack emitting gas and ejecting rocks, and would come to be known as the volcano Paricutin. Where do new volcanoes like this come from, and what triggers their unpredictable eruption?

1942年2月，墨西哥农民Dionisio Pulido认为他听到玉米田里传来雷声。然而，这声音并不是从天上传来的。源头是一个巨大的、冒着烟的裂缝，发出气体并喷射出岩石，后来被称为帕里库廷火山。像这样的新火山从何而来，又是什么引发了它们不可预知的喷发？