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Measuring the Moment, One Billionth at a Time – Boulder’s NIST

Ask someone exactly how long one second is, and you’re likely to get a smirk. If pressed, many might rely on the “one-Mississippi” trick from their hide-and-seek days. Others might claim an innate sense of it, as though they’re a minor—if punctual—X-Men style mutant. But, honestly, most would look at their smartphone. Ask the right […]

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