There very well may be other life forms out there searching for the existence of other life, like we are. via Unexplained-Mysteries Scientists have identified distant star systems from which the Earth could be 'discovered' by intelligent aliens. We're all used to hearing about astronomers scouring the heavens for signs of intelligent alien civilizations, but very little consideration is ever given to the possibility that there could be alien astronomers doing exactly the same thing somewhere out there on another world. Assuming this is true, it seems plausible that one of them might 'discover' the Earth. To investigate this idea further, astronomer Lisa Kaltenegger - director of the Carl Sagan Institute at Cornell University - teamed up with Jackie Faherty from the American Museum of Natural History to calculate how many star systems might be in a position to find us. By using data from ESA's Gaia mission - which consists of a comprehensive catalog of 2 billion stars - they looked for