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one is based on the local passage of time as measured by atomic clocks, while the other relies on the exact measurement of Earth’s rotation. The latter is not an easy exercise that involves ...

The leap second – units of time added to the atomic clock every few years to remain synchronised with astronomical time – should be replaced with a leap minute added far less frequently ...

Last month, the 2024 Nobel Peace Prize was awarded to Nihon Hidankyo, a Japanese group of atomic bomb survivors known for ...

It is 75 years since the US dropped atomic bombs on the Japanese cities of Hiroshima and Nagasaki on 6 and 9 August, leading ...

This book provides a comprehensive introduction to the physics of time and time measurement, from an historical perspective to the modern day. It discusses the stability and accuracy of atomic ...