人类时钟如何追赶不完全规则的地球
Modern clocks are extremely regular, but Earth is not. Our planet’s rotation speeds up and slows down slightly, creating a gap between atomic time and the position of the Sun.
For decades, timekeepers have sometimes added a leap second to keep the two systems close. That tiny correction can be awkward for computers, networks and services that expect every minute to behave alike.
Inspired by a public Scientific American title/summary · Rewritten by Vocabsavvy · Vocabsavvy Original (public-snippet inspired)