Chemical reactions triggered by light are ubiquitous in the world around us. From fading paintings to skin cancer, all these processes involve a type of reaction known as a photochemical reaction. Probably the most famous of all photochemical reactions is photosynthesis, a process that converts light energy into chemical energy. Plants absorb sunlight and use the energy this provides to liberate oxygen from water, which maintains the chemical composition of our atmosphere and is ultimately responsible for life on Earth.
Understanding how DNA interacts with light is one of the big challenges in
science today. Credits: http://pixabay.com/en/dna-biology-medicine-gene-163466/
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