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Those who regret how time flies can look forward to June 30, 2015 – a day that will be one second longer than usual. According to the National Aeronautics and Space Administration (NASA), June 30 will have an extra second or “leap” second because of a gradual slowing down of the Earth’s rotation.
Leap seconds are added by experts at NASA to make up for differences between two internationally-accepted time standards due to a gradual slowing down of the Earth’s rotation.
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