Earth’s oceans may have been green for billions of years

Some cyanobacteria have pigments that specialise in harvesting green light to power their photosynthesis, which may be an evolutionary adaptation to a time when the oceans were iron-rich and green-tinged

​Some cyanobacteria have pigments that specialise in harvesting green light to power their photosynthesis, which may be an evolutionary adaptation to a time when the oceans were iron-rich and green-tinged Some cyanobacteria have pigments that specialise in harvesting green light to power their photosynthesis, which may be an evolutionary adaptation to a time when the oceans were iron-rich and green-tinged