A team of physicists affiliated with several institutions in the U.S. has collaborated on a paper that discusses the possibility of using the Laser Interferometer Gravitational Wave Observatory (LIGO) to search for evidence of aliens piloting huge spacecraft around the Milky Way. They group has posted their paper on the arXiv preprint server. In this new effort, the researchers note that science has advanced to the point that gravity waves can be detected by technology such as LIGO. They further suggest that it is not beyond the realm of possibility that aliens piloting spacecraft could leave gravity waves in their...