The World's Longest-Running Experiment is Buried in a Secret Spot in Michigan

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The World's Longest-Running Experiment is Buried in a Secret Spot in Michigan
137 years ago, Dr. William James Beal walked to a secret spot on Michigan State University’s campus and planted 20 narrow-necked glass bottles filled with a mixture of moist sand and seeds. This was the start of the world's longest-running experiment.