OU on the BBC: Stardate
Adam Hart-Davis and Janet Sumner invite you to join them on a trip to Earth's "evil twin" - how did the destiny of two planets diverge so sharply?
First broadcast: Wednesday 12 Apr 2006 on BBC TWO
Copyright & revisions
Originally published: Wednesday, 4th August 2004
Last updated on: Friday, 6th August 2004
- Body text - Copyrighted: The Open University
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