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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
Evolution
Evolution

   2004    Science
Wings
Wings

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The Beauty of Maps
The Beauty of Maps

   2010    Art
Ancient Rome
Ancient Rome

   2006    History
Life
Life

   2009    Nature
Life in the Undergrowth
Life in the Undergrowth

   2005    Nature
Colour The Spectrum of Science
Colour The Spectrum of Science

   2015    Science
Earthflight
Earthflight

   2012    Nature