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The National Institute of Standards and Technology's new cesium fountain clock is one of the most precise atomic clocks ever ...
Night - Cloudy with a 87% chance of precipitation. Winds variable at 6 to 7 mph (9.7 to 11.3 kph). The overnight low will be 56 °F (13.3 °C). Mostly cloudy with a high of 68 °F (20 °C) and a ...
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