1.1 Billion Year-Old Pink Pigment
Researchers have found fossilized chlorophyll, a pigment found in plants and bacteria, in rocks over one billion years old. The pigment was pink! Chlorophyll itself is actually green, but the molecular building blocks of chlorophyll, called porphyrins, can be red or purple. The ancient oceans were swimming with brightly-colored microscopic cyanobacteria!
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