"Alpha Centauri is 4.3 light-years away ... "If this all works right, we can hold the beam together in space a very long distance — thousands of times the distance from Earth to the sun ...

Try to fathom the power of 1 million nuclear power plants. Now, imagine there is a way to pack the equivalent of that into ...

An art installation featuring 30 laser beams in primary colors will shine from the top of the Space Needle Friday night.