Nasa's Unexplained Files

7:00 AM to 8:00 AM
Wednesday 9 October
+

Top Secret Terror

Season 2 Episode 2 of 8

Images of Mercury reveal spider-like formations on its surface which may be an odd geological formation or something more ominous

Nasa's Unexplained Files airs on Discovery History +1 at 7:00 AM, Wednesday 9 October. (Subtitles.)
Topics
Education ➝ Science ➝ Factual Topics
Unexplained ➝ Mysteries