"In 1895, Wilhelm Röntgen discovered X-rays and used them to image the bones in his wife’s hand, kicking off a revolutionary diagnostic tool for medicine."
https://www.nasa.gov/missions/chandra/nasa-x-ray-telescopes-reveal-the-bones-of-a-ghostly-cosmic-hand/?utm_source=join1440&utm_medium=email&utm_placement=newsletter
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