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Cosmos

Season 1, episode 5. This player now records resume state for the active profile so browse, account, and detail pages can bring you back here quickly.

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S1 E5

Hiding in the Light

The Ship of the Imagination travels back in time to reveal 11th century Europe and North Africa during the golden age of Islam, when brilliant physicist Ibn al-Haytham discovered the scientific method and first understood how we see, and how light travels. Later, William Herschel discovers the infrared and the signature hidden in the light of every star, eventually unlocking one of the keys to the cosmos.

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A Spacetime Odyssey

Back to series detail

Episode 1: Standing Up in the Milky Way

Episode 2: Some of the Things that Molecules Do

Episode 3: When Knowledge Conquered Fear

Episode 4: A Sky Full of Ghosts

Episode 5: Hiding in the Light

Now playing

Episode 6: Deeper, Deeper, Deeper Still

Episode 7: The Clean Room

Episode 8: Sisters of the Sun

Episode 9: The Lost Worlds of Planet Earth

Episode 10: The Electric Boy

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Episode 11: The Immortals

Episode 12: The World Set Free

Episode 13: Unafraid of the Dark