Humans have been watching the stars for many thousands of years. As we evolved we found new ways to look further into the vastness of space. Our evolution involved not only peering deeper into space, but also from different angles utilizing different technologies growing our overall understanding. The thing is, we still know so very little about our own planet let alone anything else the universe may offer. That being said, it appears that astronomers believe Exoplanets may be habitable and you can learn more in this article written by the University of Cambridge for Phys.org, HERE.