Every four years, we add a day to the calendar. And that year is called a Leap Year. But Tuesday, June 20, 2015, at 5:59:59 p.m. local time, we will add a leap second. Which leads KRCL's Lara Jones to just one question: How much does this matter? To find out, she spoke with NASA Solar System Ambassador Patrick Wiggins.
Patrick Wiggins holds forth on space, science and leap seconds on his website, utahastro.info.
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