Summary:
- This article discusses the incredible precision of modern atomic clocks, which can measure time to within a picosecond (one trillionth of a second).
- These highly accurate clocks are used to test fundamental physics theories and could potentially be used to detect tiny changes in the Earth's gravitational field, which could provide insights into geological processes.
- The article explains how these clocks work and how they are being used by scientists to push the boundaries of timekeeping and measurement, leading to new discoveries about our planet and the universe.