SIMON FRASER / SCIENCE PHOTO LIBRARY SIMON FRASER / SCIENCE PHOTO LIBRARY
Autumn leaves lying on a forest floor. The leaves are from various deciduous trees, which shed their leaves in autumn to prevent water loss and frost damage over the winter period. The vivid colours seen here are due to the breakdown of the green pigment chlorophyll, which absorbs sunlight during photosynthesis. This breakdown reveals other pigments which are usually hidden by the chlorophyll. Photographed in England.
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