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Stranded in the Mojave, AstrobioBot is visited by a vision of his own 'Spirit guide', the Mars Exploration Rover (MER), Spirit. Spirit explains that it's not just living cells on Mars that AstrobioBot must search for, but also signs of past life that could prove whether or not ancient Mars was habitable.
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| Keywords from Episode 13 |
| Spirit, Ancient Mars, Warm Mars |
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