Whoever wrote the headline probably thought they were creating clickbait: “We set the clocks back this Sunday. Here’s what you need to know.” I didn’t click on the article, so I have no way of knowing ...

Atoms are the world’s most precise timekeepers – so much so that the second is defined as exactly 9 192 631 770 ticks of a caesium-based atomic clock. Commercially-available versions of these ...