Precision Design

How Did Engineers Make the Second So Precise? At 2am on Sunday 25 October, UK clocks go back an hour. That change is a human agreement. The second itself is different. Engineers have spent centuries making it more precise. This article follows that journey, from swinging pendulums to caesium atoms. Every Clock Needs a Steady

How Do a Spring, a Few Gears and a Tiny Wheel Keep Time So Accurately? A mechanical watch has no battery and no electronics. Yet the best ones keep time to within a few seconds a day. That is clockwork mechanism engineering at its finest. Four simple ideas make it work: store energy, transmit it,