IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This unit is all that remains of a ...
On Nov. 18, 1883, the scene at a Chicago railroad station reminded a Tribune reporter of the biblical story of Joshua commanding the sun to stand still. “At about a quarter to 12 o’clock, Chicago time ...
An experimental atomic clock based on a single mercury atom is now at least five times more precise than the national standard clock based on a "fountain" of cesium atoms, according to a paper by ...
An experimental atomic clock based on a single mercury atom is now at least five times more precise than the national standard clock based on a "fountain" of cesium atoms, according to a paper by ...
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