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Scientists dig into 4,300-year-old mound of bat poop
Dan Avery For Dailymail.com
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Scientists have drilled ice cores to analyze environmental changes for decades, but now the technique is being applied to a less appealing medium: Bat poop.
Researchers discovered a veritable mountain of guano deep in a cave in Jamaica, deposited over the course of 4,300 years.
Left largely undisturbed, the pile stands more than six feet tall.
Analysis of undigested material in the dung paints a timeline of everything from dry periods in the Middle Ages to the arrival of Christopher Columbus and the advent of the gas-powered engine.  ....

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