4: Messengers | Wonders of the Universe
Professor Brian Cox explores the laws of the universe. He shows how light holds the key to our understanding of the whole universe, including our own deepest origins.
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6: Surviving | The Private Life of Plants
David Attenborough concludes his incredible journey into the world of plants with a look at the techniques plants use to survive extreme temperatures.
5: Living Together | The Private Life of Plants
David Attenborough looks at how plants often rely on animals, fungi and each other for food, protection or a home, but they do not always co-exist peacefully.