Iran Daily

Scientists discover world’s oldest colors

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Scientists have unearthed the world’s oldest colors, or pigments, from deep beneath the Sahara. Researcher­s found 1.1 million-yearold pink pigments inside ancient rocks dredged from beneath Africa’s Great Desert. The colors are more than 500 million years older than the next oldest pigments, UPI reported.

Nur Gueneli, an earth scientist at Australia National University, said, “The bright pink pigments are the molecular fossils of chlorophyl­l that were produced by ancient photosynth­etic organisms inhabiting an ancient ocean that has long since vanished.”

When diluted, the pigments appear a light pink. When concentrat­ed inside ancient marine shales, the pigments take on a variety of tints, from blood red to deep purple.

Scientists were able to extract the pigment molecules from the ancient rocks after grinding the basalts into a powder.

Gueneli said, “The precise analysis of the ancient pigments confirmed that tiny cyanobacte­ria dominated the base of the food chain in the oceans a billion years ago, which helps to explain why animals did not exist at the time.”

Researcher­s described their discovery of ancient pigments in the journal PNAS.

 ??  ?? The pink pigments, called porphyrins, were extracted from rocks more than a billion years old. Published in UPI
The pink pigments, called porphyrins, were extracted from rocks more than a billion years old. Published in UPI

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