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biological colours

Scientists find ‘world’s oldest’ biological colours

MELBOURNE: Australian researchers have uncovered the world's oldest biological colour in the Sahara desert, in a find they said Tuesday helped explain why complex lifeforms only recently emerged on earth. The pink pigments were produced by simple microscopic organisms called cyanobacteria more than 1.1 billion years ago, some 500 million years older than previous colour pigment discoveries. That makes the samples around "fifteen times older" than the Tyrannosaurus Rex dinosaur species, according to senior Australian…