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Colours Of Earth

   2015    Science
In this episode, Helen seeks out the colours that turned planet Earth multicoloured. To investigate the essence of sunlight Helen travels to California to visit the largest solar telescope in the world. She discovers how the most vivid blue is formed from sulfur atoms deep within the Earth's crust and why the presence of red ochre is a key sign of life. In gold, she discovers why this most precious of metals shouldn't even exist on the surface of the planet and in white, Helen travels to one of the hottest places on Earth to explore the role salt and water played in shaping planet Earth.
Series: Colour The Spectrum of Science
Cosmos
Cosmos

   1980    Science
The Human Body
The Human Body

   1998    Medicine
Racism: A History
Racism: A History

   2007    Culture
Conquistadors
Conquistadors

   2002    History
The Life of Birds
The Life of Birds

   1998    Nature
Planet Earth II
Planet Earth II

   2016    Nature
Through the Wormhole Season 6
Through the Wormhole Season 6

   2015    Science
How the Universe Works Season 6
How the Universe Works Season 6

   2018    Science