Humanities Channel
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Medieval monks reused an animal skin parchment and in the process removed the writing. However, not all the writing was removed and it has been identified that the writing was a map of the stars written by the Greek astronomer Hipparchus. Now x-rays from a particle accelerator are trying to recover the lost text. The original text dating to about 129 BCE is the earliest known map of the stars. https://www.smithsonianmag.com/smart-news/medieval-monks-wrote-over-a-copy-of-an-ancient-star-catalog-now-a-particle-accelerator-is-revealing-the-long-lost-original-text-180988123/
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