Calling All Aliens
Are we alone? This is a question probably as old as humankind. Not only has it been the subject of philosophical disputes, but there is even a scientific discipline that is looking to answer that question: SETI - "The Search for Extraterrestrial Intelligence".
From Europe to the United States, from South Africa to Russia, physicists, biologists and believers build giant radiotelescopes that are able to receive extraterrestrial signals. Christian Schidlowski's two-part documentary takes us to the labs of the most perculiar science in the world.