The conversation between human and AI assistant.
When the first clock was invented, How did they know what time it was?
That's really interesting. How do atomic clocks work?
Atomic clocks work by measuring the vibrations of atoms, specifically the isotope cesium-133. These vibrations are incredibly stable and allow for extremely precise timekeeping. In fact, atomic clocks are so accurate that they can measure time to within a billionth of a second.