World’s ‘oldest coloured molecules’ are bright pink

​ Image copyrightLANNON HARLEYImage captionThe pink pigments are the fossilised molecules of ancient sea organisms Scientists have discovered what they say are the world’s oldest surviving biological colours, from ancient rocks beneath the Sahara desert. The 1.1 billion-year-old pigments have a bright pink hue, but range from blood red to deep purple in their concentrated … Continue reading World’s ‘oldest coloured molecules’ are bright pink