The “minute” on your phone is not a natural thing. Nothing in the sky divides an hour into 60 equal parts. Humans invented ...

LIGO, the Laser Interferometer Gravitational-wave Observatory, has been called the most precise ruler in the world for its ability to measure motions more than 10,000 times smaller than the width of a ...

Climate change has been blamed for many dramatic effects on our planet and our lives. Now it may even affect the measurement of time. You've probably heard of "leap seconds" — the sliver of time ...