The 'leap second' could disappear. How a minor time adjustment became a major problem

A new system, called the “leap hour,” will allow Earth’s rotation and official time to fall out of alignment by a full hour

For more than 50 years, humanity has used "leap seconds" to keep our clocks aligned with the rotation of the Earth. On Thursday, an international time-keeping body in France is expected to do away with leap seconds and let the clocks slip until they're out of alignment by a full…