We've all heard someone called so-and-so the second and others called blah-blah-blah Jr. but what mak...

December 31st will be a long day this year. One second longer, to be exact. The earth's trip around the...  ...come out even, so every once in a while, another second is added to the last day of the year. The Inter...  ...fference in the two timescales and calls for leap seconds...