Inside the lab of Canada's timekeeper | CBC News
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/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer/5e/71/5e7128e7-fb0f-466d-ae44-cdf489741a4f/16pml015_ytterbium_clock_n_phillips_hr_1.jpeg "Scientists Measure the Second With Record-Breaking Precision | Science| Smithsonian Magazine")
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Inside the lab of Canada's timekeeper | CBC News
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