A couple of years back, British cosmologist Stephen Hawking caused quite a stir around the globe when he advised mankind against contacting aliens, for it could lead to a highly advanced alien species paying us a rather hostile visit. In case his fears aren’t entirely unwarranted as some contend, it might already be too late for us to prevent them from contacting us. As it turns out, our planet is surrounded by an ever-expanding radio emission bubble over 100 light-years in diameter. While the possibility of an alien invasion has been probed umpteen times in science fiction, its impact on product warranties has been entirely overlooked. Hit the jump for more.