The world’s most accurate clocks
In 1967, researchers gathered to answer one question: how long is a second? It might seem obvious. A second is the tick of a clock or the swing of a pendulum. But how precise are those measurements? And what is that length based on?
Read Our story
- Do you think life would be better or worse if we stopped using clocks altogether? Think about your answer and discuss it with members of your household.
- Write a script for a film about a day when time starts moving backwards.