How time has been kept throughout history: from sundials to atomic clocks.

This article discusses the history of timekeeping, from ancient sundials to modern atomic clocks. Clocks are devices that measure and display the passage of time, and they have evolved over time with advancements in technology. Mechanical clocks, such as those with verge escapement mechanisms and balance wheels, were developed in the 13th century. Spring-driven clocks and pendulum clocks were later invented, leading to the advent of pocket watches. The marine chronometer was created in the 18th century to accurately determine longitude at sea. Quartz clocks, which use quartz crystals as resonators, became common in the mid-20th century. Atomic clocks, which use lasers and atoms as resonators, are the most accurate timekeeping devices today. Recent developments include the creation of nuclear clocks with ultra-high precision. [Extracted from the article]