The room is dark. There's a quiet whirr of fans. Nature sounds play from unseen speakers. One wall is decorated with what I assume is artificial greenery. In the center, a head. Blue and purple and ...

Holograms. Practically every sci-fi movie and TV show from the last 50 years has some version of this futuristic technology. A realistic 3D object composed of nothing more than light, usually hovering ...

Particles of twisted light that have been entangled using quantum mechanics offer a new approach to dense and secure data storage. Holograms that produce 3-D images and serve as security features on ...