Are We Alone in the Universe? is a 2008 BBC Horizon episode hosted by Ian Holm which looks at 50 years of efforts to determine whether we are alone in this universe or whether alien life exists in our solar system or beyond. The documentary was made in the aftermath of a potential breakthrough in the search for extraterrestrial life, the discovery of a planet named Gliese 581 c which is the most earth like planet ever discovered.
The planet orbits a star, just like earth, and astronomers believe that it may have habitats which are capable of supporting life in some form. With increases in technology astronomers believe that they will discover many more planets like Gliese 581 c which may be capable of supporting life.