The x-ray was discovered 121 years ago today on November 8, 1895 by Wilhelm Roentgen of Bavaria, and his discovery has since shaped the face of many branches of science. Our understanding of the double-helix shape of DNA was provided in part by x-ray crystallography. In 1999, NASA deployed the Chandra X-ray Observatory aboard the Space Shuttle Columbia, which has since studied and discovered black holes and advanced our understanding of dark matter.

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