Known Universe: Alien ContactAre we alone? It's an age-old question that was relatively "taboo" in mainstream science until the mid-1990s, when astronomers found planets outside our solar system.

Now, Known Universe joins the hunt for alien life as scientists search for planets with similar characteristics to Earth's.

We'll take you on a journey to find planets that may support life and show you new space-based technologies that aid in the search for advanced alien civilizations.

Watch the full documentary now