Nasa's Unexplained Files

3:00 PM to 4:00 PM
Tuesday 3 December
+

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 3:00 PM, Tuesday 3 December. (Subtitles.)
Topics
Education ➝ Science ➝ Factual Topics
Unexplained ➝ Mysteries