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File name: cyanobacteria_richard_droker_620.jpg

Original Resolution (pixels): 620 × 413

File Size: 130 KB (MIME Type: image/jpeg)

Date Published: February 2, 2021

Alternate Text: Cyanobacteria photo by Richard Droker

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Image caption

Ancestors of modern cyanobacteria (blue-green algae) may have been the first oxygen producers on planet Earth, and ushered in significant changes in climate. CC license by Flickr user Richard Droker.