Measuring the strength of gravity is extraordinarily difficult, and different experiments have always disagreed – but a new ...

Over the past decades, technological advances have opened remarkable possibilities for the detection and monitoring of ...

A compass always points north—or does it? Magnets normally maintain a stable direction of magnetization, pointing from south ...

Over the last few years, optical atomic clocks have broken record after record in precision timekeeping. Atoms are cooled to ...

In quantum mechanics, particles do not behave like everyday objects. Instead of existing in one clearly defined state, they ...