Colour: The Spectrum of Science We live in a world ablaze with colours, far more complex and fascinating than they appear. In this series, physicist Helen Czerski uncovers what colour is, how it works, and how it has written the story of our planet. Select a Season 1 Ep. 2 - Colours of Life Dec 13, 2017 – 50:17 Physicist Helen Czerski examines life forms and their use of colour, from iridescence to chlorophyll. Ep. 1 - Colours of Earth Dec 06, 2017 – 54:16 This episode focuses on chemistry in the five colours that tell the story of the planet itself.