Disappointed about Doctor Who's TARDIS ending up at the wrong place at the wrong time? Don't be – it's incredibly precise.
2016 has been a long year, but it'll be made slightly longer care of a leap second. But why do we need such things?
Measuring time is a crucial part of navigation – particularly in space, where exacting precision is called for. The DSAC is poised to make a change that will aid future deep space missions.
From sundials to atomic clocks, a journey through the way humans have measured time.
A podcast on time: telling it, perceiving it, doing it and travelling through it.
They are the most accurate clocks on the planet and a few more in space. So why are researchers trying to make atomic clocks even more accurate?
Keeping time isn't easy, particularly as the Earth's rotation is slowing down, so we need to keep adding troublesome leap seconds.