Series 1 Episode 3
First Broadcast: 12AM Mon 21 January 2002

Cosmologists answer questions about the shape and size of the cosmos, and how, by decoding radiation from the dawn of time - 15 billion years ago - they can discover the limits and the ultimate destiny of the Universe.

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In this three-part series the world's leading astronomers and cosmologists reveal extraordinary new discoveries about the shape and structure of the universe and what lies beyond its edge