Nasa's Unexplained Files
Mars's Deepest Secret
Season 4 Episode 8 of 8
An account of how a malfunction on the ISS threatens to poison the crew with a deadly gas, and a startling image taken by a Nasa probe points to evidence of life on Mars
Nasa's Unexplained Files airs on Discovery Science +1 at 10:00 AM, Tuesday 22 April. (Subtitles.)
Topics
Education ➝ Science ➝ Factual Topics
Unexplained ➝ Mysteries