The idea of traveling through interstellar space using spacecraft propelled by ultrathin sails may sound like the stuff of sci-fi novels. But in fact, a program started in 2016 by Stephen Hawking and ...

As the demand for digital security grows, researchers have developed a new optical system that uses holograms to encode information ...

A team of Caltech scientists has made the first experimental measurements of laser-induced motions of miniature lightsails in the lab.