Condensed-matter physics is the study of substances in their solid state. This includes the investigation of both crystalline solids in which the atoms are positioned on a repeating three-dimensional ...

Optical physics is the study of the fundamental properties of light and its interaction with matter. This includes classical optical phenomena such as reflection, refraction, diffraction and ...

June 24, 2026 • The Ebola outbreak in the Democratic Republic of Congo is growing – and is likely larger than official numbers show. The deadly disease spreads through bodily fluids, on average ...