Journeys in Time and Space

The Search for Intelligent Life (1x6)

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Chris Riley investigates the science behind the newest SETI (Search for Extra-Terrestrial Intelligence) project, which aims to spot laser flashes from distant civilisations. Is alien life inevitable or unlikely? Sir Patrick Moore talks about his lifetime of astronomy. And there's a flight through the unknown atmosphere of Titan, one of Saturn's moons. Might the infant Earth have looked like this?