How did timekeeping technology evolve in the 20th century?
The 20th century witnessed remarkable advancements in timekeeping technology, most notably the development of quartz and atomic clocks. Quartz clocks, using the regular vibrations of quartz crystals, offered unprecedented accuracy. Even more groundbreaking were atomic clocks, which measure time based on the vibration of atoms, achieving accuracy down to billionths of a second. These innovations have set the standard for precision in modern timekeeping.