Nasa's Unexplained Files
The Earth Next Door
Season 4 of 8
Astronomers detect a potentially habitable planet that appears to be remarkably close to Earth, and a chance discovery at Nasa unveils a top secret military space program
Nasa's Unexplained Files airs on Discovery Science at 8:00 AM, Friday 27 December. (Subtitles.)
Topics
Education ➝ Science ➝ Factual Topics
Unexplained ➝ Mysteries