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Scientists dig into 4,300-year-old mound of bat poop Dan Avery For Dailymail.com © Provided by Daily Mail MailOnline logo 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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