When did Horizon Season 7 Episode 13 air?
Horizon Season 7 Episode 13 aired on April 13, 1970.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
A Horizon investigation into the research done in Britain and the USA to support the 'Continental Drift' theory.
Direct answers for episode-level questions and details.
Horizon Season 7 Episode 13 aired on April 13, 1970.
This episode runs for approximately 60 minutes.
Comments coming soon
Discuss episodes with other viewers