Only in recent years have we developed the ability to extract microscopic ash shards from polar ice cores and conduct detailed chemical analyses on them. These shards are incredibly minute, roughly one-tenth the diameter of a human hair.
Finding the match took a long time and required extensive collaboration with colleagues from Japan and Russia, who sent us samples collected from these remote volcanoes decades ago.
The moment in the lab when we found the perfect fingerprint match to the Zavaritskii volcano was incredibly gratifying; it felt like solving a centuries-old mystery.
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