Tick tock. For anyone over the age of 25, the association with those words is not the generation-defining app, but clocks. Clocks help us (try to) get up on time and ensure that our pasta is perfectly al dente. But how do clocks actually keep time? And how do we decide how we divide time up?

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👨‍🔬 Evrim Yazgin is a Cosmos journalist with a Masters in Physics from the University of Melbourne. His love of science fiction has spurred an interest in all things flux capacitor to quantum-time-antimatter-inverters.

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