Georgians, including the archbishop of Atlanta and Gov. Brian Kemp. mourn the death of Pope Francis, the head of the Roman Catholic Church. Some experts question Kemp’s broader promise of lower ...

Researchers at Rice University have developed a sophisticated 3D photonic-crystal cavity that can trap and control light in ...

Light can tie knots—literally. Engineers at Duke University have managed to manipulate laser beams to form intricate 3D patterns called optical knots, using custom-designed optics. These twisted beams ...