Add Yahoo as a preferred source to see more of our stories on Google. In a discovery that challenges conventional optics, scientists have managed to make a laser beam cast its own shadow—a feat ...

Researchers have found that under certain conditions, a laser beam can act like an opaque object and cast a shadow, opening new possibilities for technologies that could use a laser beam to control ...

Is the truth about aliens out there? One town wants to find out. A community in Kentucky has come up with an unusual approach to promoting tourism – the world's first interstellar tourism campaign.

Eerie beams of light are appearing at night along both sides of the U.S.-Canada border, and it didn’t take long for “UFO abduction rays” and “aliens beaming down” to enter the online discussion. In ...

A Kentucky city has drummed up a unique way to boost tourism in the Blue Grass state — by blasting an invitation to aliens possibly living in a star system 40 lightyears away. Scientists in Lexington ...

For the experiment, a high-power green laser was directed through ruby cube and illuminated with a blue laser from the side. The green laser increases the optical absorption of the blue illuminating ...