Scientists Offer Plan To Hide Earth From Advanced Space Aliens

Talk about irony. At a time when many astronomers are trying hard to find evidence of alien life, a pair of astronomers at Columbia University are exploring what we might do to keep aliens from finding us. Professor David M. Kipping and graduate student Alan Teachey say in a new paper that lasers could be used as a sort of cloaking device to conceal our planet from aliens' prying eyes. By directing laser beams at star systems where aliens might live at just the right time, the astronomers argue,...