Alien species are in our galaxy - and could tell us how long we'll last, according to scientists.
Writing inThe Astrophysical Journal, researchers looked into the likely number of Communicating Extra-Terrestrial Intelligent (CETI) civilizations in the Milky Way.
Their paper claimed there could be at least 36 civilizations within our galaxy - however, the authors said the average distance to one of these civilizations is about 17,000 light-years.
