Time crystals, a state of matter once thought physically impossible, could soon be on a banknote.

At just 25, Cecilia Payne-Gaposchkin applied quantum physics to a treasure trove of astronomical observations to show that stars are mostly hydrogen and helium.

This research suggests that even chaotic, unpredictable phenomena, like waves on a shore or the beating of a heart, can be ...

The speed of light, c, is not just a very large number. In modern physics it is a structural constant: the conversion factor ...